Japan Radio NKE2252 25KW X-Band Radar Transceiver User Manual

Japan Radio Co Ltd. 25KW X-Band Radar Transceiver

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SECTION 4
MEASUREMENT OF
RANGE AND BEARING
4.1
4.2
4.3
4.4
Measurement by Trackball ............................. 4-1
Measurement by Range Rings ....................... 4-2
Measurement by EBLs and VRMs ................. 4-3
Measurement between Two Optional Points. 4-5
4.1
Procedures
MEASUREMENT BY TRACKBALL
Check the target echoes on the radar display.
Move the cursor mark to a target by the trackball.
The
CURSOR
on the radar display indicates the bearing and range of the target.
The range is a distance from own ship’s position.
CURSOR (
TRUE 45.0°:
True bearing of the cursor relative to own ship
5.0nm:
Range between the cursor and own ship
REL 45.0°:
Relative bearing of the cursor relative to own ship
Target
Own ship
Figure 4.1
4─1
Cursor
4.2
Procedures
MEASUREMENT BY RANGE RINGS
Press [RR/HL] key.
The Range Rings will appear on the radar display.
The range between the target and own ships can be determined by visually measuring
the target’s position that lies between two range rings.
(The range ring interval is fixed and indicated within the radar display  on page 2-9.)
4─2
4.3
Procedures
MEASUREMENT BY EBLS AND VRMS ･･
Press [EBL1] key to select EBL1 display and operation.
The EBL1 indication at the lower right of the radar display will be selected and the
EBL1 will appear as a broken-line on the PPI display.
Turn the [EBL] control to put EBL1 on a target.
The bearing of the EBL1 will appear at the lower right of the radar display.
bearing represents the target’s bearing.
The EBL1
Press [VRM1] key to select VRM1 display and operation.
The VRM1 indication at the lower right of the radar display will be selected and the
VRM1 will appear as a broken-line circle on the PPI display.
Move the broken-line VRM1 to the target by using the [VRM]
control.
The range of the VRM1 from own ship will appear at the lower right of the radar
display. The range of VRM1 signifies a distance between the target and own ship.
Refer to Figure 4.2 in the next page.
In this Figure 4.2, the range and bearing are;
Range:
5.0nm
Bearing:
45.0°
4─3
4.3 MEASUREMENT BY EBLS AND VRMS


Figure 4.2
Target
Own ship
VRM Control
EBL Control
4─4
4.4
Procedures
MEASUREMENT BETWEEN TWO
OPTIONAL POINTS
Press [EBL2] key to select EBL2 display and operation.
The EBL2 indication at the lower right of the radar display will be selected and the
EBL2 will appear as a dotted-line on the PPI display.
Point the cursor to the C
EBL1 T 123.4
°
switch of EBL2 at the lower
EBL2 T 004.3
°
right of the radar display, and
press [ENT] key. The EBL cursor mode changes
each time O or L is pressed.
Using the trackball, move the starting point of EBL2 to one
(A) of the two points and press [ENT] key.
(See Figure 4.3.)
Turn the [EBL] control to move EBL2 to the other point (B).
(See Figure 4.3.)
Press [VRM2] key to select VRM2 display and operation.
¡ (VRM marker) will appear on a dotted-line of the EBL2.
Using the [VRM] control, move the VRM2 marker on a
dotted-line of EBL2 to the point B.
The bearing and range between the two points will appear in the VRM2 and EBL2 area
on the lower right of the radar display.
4─5
4.4 MEASUREMENT BETWEEN TWO OPTIONAL POINTS RINGS


VRM2 Marker
Starting point of EBL2
Cape
Own ship
VRM Control
EBL Control
Figure 4.3
It is also possible to use EBL1 instead of EBL2 in measuring the bearing and range
between two optional points.
In this case, read EBL2 as EBL1 and VRM2 as VRM1 in the procedure above, point the
cursor to C of EBL2 in step 2, and then press [ENT] key.
4─6
SECTION 5
OPERATION OF
ARPA AND AIS
5.1 PREPARATION........................................................... 5-2
5.1.1 Collision Avoidance ............................................ 5-4
5.1.2 Definitions of Symbols ....................................... 5-7
5.1.3 Setting Collision Decision Criteria
(CPA/TCPA Limit)................................................. 5-9
5.1.4 Setting Vectors (Vector Time)........................... 5-10
5.1.5 Setting CPA Ring (CPA Ring).............................5-11
5.1.6 Setting Automatic Acquisition Key Assignment
(GZ Alarm Key Setting) ................................... 5-12
5.2 EPA OPERATION ..................................................... 5-13
5.2.1 Plotting Targets ................................................. 5-13
5.2.2 Modifying Plotted Target Data .......................... 5-14
5.2.3 Canceling Plotted Target Data.......................... 5-14
5.2.4 Displaying Numeric Data of Plotted Targets.... 5-15
5.2.5 Setting EPA Alarm (Audible Warning).............. 5-16
5.3 ATA/ARPA OPERATION ........................................... 5-17
5.3.1 Acquiring Target................................................ 5-17
5.3.2 Canceling Unwanted Targets............................ 5-19
5.3.3 Displaying Target ID No.
(Target Number Display) ................................... 5-20
5.3.4 ATA/ARPA Data Display .................................... 5-21
5.3.5 Target Data Display........................................... 5-26
5.3.6 Alarm Display .................................................... 5-30
5.3.7 Trial Maneuvering (Trial) ................................... 5-34
5.3.8 ATA/ARPA Simulation........................................ 5-38
5.3.9 Setting ATA/ARPA Tracks (ATA Track Setting). 5-44
5.4 AIS OPERATION....................................................... 5-51
5.4.1 Initial Setting...................................................... 5-52
5.4.2 Setting AIS Display Function (AIS Function) ... 5-54
5.4.3 Activating AIS Targets....................................... 5-55
5.4.4 Deactivating AIS Targets ................................... 5-56
5.4.5 Setting AIS Symbol Display Function
(AIS Symbol Display)......................................... 5-57
5.4.6 Displaying Numeric Data of AIS Targets .......... 5-58
5.4.7
Setting ATA/ARPA Symbol Display Function
(ATA Symbol Display) ........................................ 5-60
5.4.8 Setting AIS Filter (AIS Filter Setting) ................ 5-61
5.4.9 Deciding AIS Target and ARPA Target as the
Same One (Identical Distance).......................... 5-64
5.4.10 Conditions for Deciding AIS Target to be Lost
............................................................................ 5-66
5.4.11 Displaying AIS Symbols .................................. 5-67
5.4.12 AIS Alarm Display............................................ 5-68
5.4.13 Restrictions...................................................... 5-69
USAGE OF ARPA
Attention
l There are the following limitations on use of the target acquisition and
tracking functions of ARPA.
[I] Resolution between adjacent targets and swapping during
automatic tracking
Depending on the particular distance and echo size, resolution between
adjacent targets during automatic tracking usually ranges somewhere
between 0.03 to 0.05 nm.
If multiple targets approach each other,
resolution will become about 0.03 nm and this may cause the system to
regard them as one target and thus to swap them or lose part of them.
Such swapping or less of targets may also occur if the picture of the
target being tracked is affected by rain/snow clutter returns or sea
clutter returns or moves very close to land.
[II] Intensity of echoes and the tracking function
The intensity of echoes and the tracking function have a correlationship,
and thus the target will be lost if no echoes are detected during six
scans in succession.
If a lost target exists, therefore, radar gain must
be increased to support detection of the target. If, however, radar gain is
increased too significantly, sea clutter returns or other noise may be
erroneously detected and tracked as a target, and resultingly, a false
alarm may be issued.
[III] Adverse effects of error sources on automatic tracking
To execute accurate tracking, it becomes necessary first to appropriately
adjust the [GAIN], [SEA] and [RAIN] controls of the radar so that the
target to be acquired and tracked id clearly displayed on the radar
display.
Inappropriate settings of these controls reduce the
reliability/accuracy of automatic tracking.
5─1
5.1
PREPARATION
This section explains the features of EPA/ATA/ARPA and AIS functions, and the initial setting for using each
function.
The four plotting functions below are available with this radar equipment.
An optional device is necessary for using each of the ATA, ARPA, and AIS functions.
EPA (Electronic Plotting Aid) function
The EPA function calculates the course and speed of a target from the positions of the target that have
been entered manually at specified intervals.
The EPA function is available when the ATA and ARPA options are not installed.
ATA (Automatic Tracking Aid) function
The ATA function calculates the course and speed of a target by automatically tracking the target’s move.
The ATA function enables automatic acquisition of targets by using the guard zone function.
The ATA function is available when the ATA option is installed.
(This function cannot be used with the ARPA option.)
ARPA (Automatic Radar Plotting Aid) function
The ARPA function calculates the course and speed of a target by automatically tracking the target’s
move.
The ARPA function enables automatic acquisition of targets by using the guard zone function.
The ARPA function also enables the simulation of the maneuvering method for avoiding collision by
using the trial maneuvering function.
The ARPA function is available when the ARPA option is installed.
The ARPA function provides higher-level functions than the ATA function.
(This function cannot be used with the ATA option.)
AIS (Automatic Identification System) function
The AIS function shows the target’s information on the radar display, using other ships’ information sent
out from the AIS unit.
The AIS function is available when the optional AIS interface is installed.
5─2
Attention
l The menu display is changed to “ATA” or “ARPA” according
to option provided in this radar equipment. Where the ARPA
option is provided, the ARPA Setting is displayed in the menu.
Also where the ATA option is provided, the ATA Setting is
displayed in the menu.
This manual basically displays using “ATA”.
5─3
5.1 PREPARATION
5.1.1


Collision Avoidance
Problems of Collision Avoidance in Navigation
Marine collision avoidance is one of the problems that have been recognized from of old. Now, it will be
described briefly who the collision avoidance is positioned among the navigational aid problems.
The navigation pattern of all mobile craft constitutes a system with some closed loops regardless of the media
through which the mobile craft travels, whether air, water, the boundary between air and water, or space. This
pattern consists of two closed loops in principle, one of which is a collision with another mobile craft and the
other is a loop of finding a right and safe way to reach a predeterminate destination. Fig. 5-1 shows the
conceptual diagram of navigation pattern by MR. E.W. Anderson. The closed loop of collision avoidance is
shown on the left side and the closed loop of finding a right course on the right side.
Fig. 5-1
Navigation Pattern
Marine Accidents and Collisions
Among marine accidents, collision accidents have been highlighted as the tonnages and speeds of ships become
higher along with the increase in traffic at sea. If a tanker carrying dangerous articles such as crude oil
collides with any other vessel, then not only the vessels involved with the accident but other vessels in the
vicinity, port facilities, inhabitants in the coastal area as well as marine resources may also suffer immeasurable
damages and troubles. Collision accidents have a high percentage of the marine accidents that have occurred
in recent years. To cope with these problems, any effective measures are needed and some equipment to
achieve collision avoidance requirements have been developed at rapid strides.
5─4
Basic Concept of Collision Avoidance
There are two aspects in collision avoidance: collision prediction and avoidance. Collision prediction is to
predict that two or more vessels will happen to occupy the same point at the same time, while collision
avoidance is to maneuver vessels not to occupy the same point at the same time.
In practical operation of vessels, a spot of collision has to be deemed to be a single point but a closed zone.
This closed zone is conceptually defined as a CPA (Closest Point of Approach). In collision prediction, the
time to be taken until a ship reaches the CPA is defined as a TCPA (Time to CPA).
Fig. 5-2 shows a diagram caked “Collision Triangle”.
Fig. 5-2
Collision Triangle
Relative Vector and True Vector
From two points of view, collision prediction and avoidance, it is necessary to obtain the relative vector of other
ship for prediction and the true vector of other ship for collision avoidance in order to grasp other ship’s aspect.
The relationship between the relative vector and true vector is shown in Fig. 5-3
Both rough CPA and TCPA can be obtained easily from the relative speed vector of other ship. This method
has an advantage that the risks of collision with all other ships within the radar range can be seen at a glance.
On the other hand, the course and speed of other ship can easily be obtained from its true speed vector, enabling
other ship’s aspect to be seen at a glance. Thus, the aspects of other ships (transverse, outsail, parallel run,
reverse run, etc. ) as described in the Act of Prevention of Collision at Sea can be readily grasped. If there is a
risk of collision with other ship, the operator can determine which rule to be applied and how to operate own
ship.
5─5
5.1 PREPARATION


Fig. 5-3
Relative Vector and True vector
Radar and Collision Avoidance
Radar is still playing an important roll for collision prevention and positioning. A plotter is used to further
enhance the radar functionality. The plotter is capable of plotting other positions of other ships in 3 to 6
minute intervals to monitor their movement. The plots of other ships represent their tracks relative to own
ship, and it is shown whether there is a risk of collision, namely CPA and TCPA can be obtained. This method
using a plotter is fairly effective, but the number of target ship, which are manually plotted, is limited and it
takes several minutes to measure those.
5─6
5.1.2
Definitions of Symbols
Types and Definitions of EPA, ATA, and ARPA Symbols
Vector/Symbol
Definition
Remarks
Safe target
Alarm characters (CPA/TCPA) appear and an
alarm sounds.
The vector and symbol blinks with red lamp.
Dangerous target
Target for which numeric data is
displayed
When numeric data is displayed, the target
symbol is changed into
□.
Initial acquisition mark
(EPA)
This symbol is displayed when the first
plotting is performed.
(ATA/ARPA)
This symbol is displayed until the vector is
displayed after target acquisition.
Target that has intruded into the
guard zone
Alarm characters (GZ) appear and an alarm
sounds.
The characters blinks with red lamp.
Lost target (a target that can not be
tracked for any reason)
Alarm characters (LOST) appear and an alarm
sounds. The symbol blinks. No vector is
displayed.
Trackball cross cursor mark
This mark is used to designate a target when
acquiring manually and canceling it and
indicating its numerical data.
A target’s past positions
The symbol and vector is displayed only when
[PAST POSN] is ON. The position interval
can be set to
OFF/0.5min/1min/2min/4min
0.1nm/0.2nm/0.5nm/1nm
Plot data modification
This symbol is displayed only for (EPA).
“M” is shown beside the symbol indicating
that plotted target data is being modified.
The previous plotting position is displayed.
Plot data update request
This symbol is displayed only for (EPA).
This symbol is displayed when plotted target
data is not updated for 10 minutes. When it is
not updated, the symbol disappears after 5
minutes. A LOST alarm sounds.
5─7
5.1 PREPARATION


Types and Definitions of AIS Symbols
Vector/Symbol
Definition
Remarks
Sleeping target
This symbol is displayed when received data
is valid.
The direction of the triangle’s vertex indicates
the target’s bow or COG.
Activated target
The heading direction is displayed with a
solid line, and the COG vector is displayed
with a dotted line. The line perpendicular to
the heading direction indicates the direction to
which the course is to be changed. This line
may not be displayed.
Numeric-displayed target
This symbols is displayed around the target
for which numeric data is displayed.
Dangerous target
Alarm characters (CPA/TCPA)
An alarm sounds.
The characters are displayed in red and the
symbol is blinks.
Lost target
The dangerous target is regarded as a lost
target when data cannot be received for
specified time. When it is determined as a lost
target, this symbol is displayed at the position
calculated from the last-received data such as
the course and speed.
5─8
5.1.3
Setting Collision Decision Criteria (CPA/TCPA Limit)
For details on each operation, see 3.4 BASIC OPERATION and 4 MEASUREMENT OF RANGE AND
BEARING.
Attention
l Set the optimum values of collision decision
conditions, depending upon vessel type, water area,
weather and oceanographic conditions.
(For the relations between those conditions and
alarms, refer to section 5.3.6 Alarm Display. )
Set and check collision decision criteria before operating the ARPA system.
Procedures
Press [ATA MENU] key.
Press [1].
The ATA Setting menu will appear.
Press [3].
The ten-key screen will appear.
Select the value to be set pressing the
numeric key, and press [ENT].
The selected CPA Limit value will be
determined.
Press [4].
ATA Setting
1. Vector Time
6 min
2. Past Position
OFF
3. CPA Limit
10 nm
4. TCPA Limit
1 min
5. CPA Ring
ON
6. Trial
＞
The ten-key screen will appear.
6. Select the value to be set pressing the
numeric key, and press [ENT].
The selected TCPA Limit value will be
determined.
9. Target Number Display
ON
0. EXIT
5─9
5.1 PREPARATION
5.1.4


Setting Vectors (Vector Time)
Vector time can be set in minutes in the range 1 to 60 min.
A true (T) vector mode or relative (R) vector mode can be selected.
Setting vector time using the menu
Procedures
Press [ATA MENU] key.
Press [1].
The ATA Setting menu will appear.
Press [1].
The ten-key screen will appear.
Select the vector time to be set
pressing the numeric key, and press
[ENT].
The selected vector time will be determined.
Setting vector time using the multi-function control
Procedures
9. Target Number Display
ON
0. EXIT
Press the [MULTI] control several times to activate the
mode.
VECTOR
display.
ATA Setting
1. Vector Time
6 min
2. Past Position
OFF
3. CPA Limit
10 nm
4. TCPA Limit
1 min
5. CPA Ring
ON
6. Trial
＞
will appear in the
MULTI
VECTOR
mode field at the lower left of the radar
Turn the [MULTI] control to set the vector time.
Setting vector mode
Procedures
Press the [VECT] key to select the vector mode.
T or R will appear indicating the vector mode in the ARPA information display
area at the upper right of the radar display.
5─10
5.1.5
Setting CPA Ring (CPA Ring)
Procedures
Press [ATA MENU] key.
Press [1].
The ATA Setting menu will appear.
Press [5].
The setting of CPA Ring will change between
ON and OFF.
ON: Displays the CPA ring.
OFF: Hides the CPA ring.
While the CPA ring is displayed, CPA RING
is shown at the upper right of the radar display.
ATA Setting
1. Vector Time
6 min
2. Past Position
OFF
3. CPA Limit
10 nm
4. TCPA Limit
1 min
5. CPA Ring
ON
6. TRIAL
While the distance of the specified CPA Limit
value is used as the radius, the CPA ring is
displayed with a red circle of which center is the
own ship’s position.
Note: The CPA ring is not displayed when the true (T) vector mode
is selected.
* The CPA ring switch to Display or Hide within the radar display
5─11
21
9. Target Number Display
ON
0. EXIT
on page 2-7.
5.1 PREPARATION
5.1.6


Setting Automatic Acquisition Key Assignment
(GZ Alarm Key Setting)
This section explains how to set a guard zone that is to be assigned to the [GZ ALARM] key.
The setting enables the operator to select ON/OFF for a generally used guard zone by simply operating the
[GZ ALARM] key on the control panel.
Procedures
Press [ATA MENU] key.
Guard Zone Alarm Key Setting
1. Guard Zone 1
Press [4].
ON
2. Guard Zone 2
Press [3].
OFF
Press [1].
Guard Zone menu will appear.
ON: Turns on the guard zone when the [GZ
ALARM] key is pressed.
OFF: Does not turn on the guard zone when
the [GZ ALARM] key is pressed.
0. EXIT
The same function also as RADAR Alarm (Sector Alarm) can be given.
Procedures
Press [ATA MENU] key.
Press [4].
Press [3].
Press [2].
* The setting method is the same as the method of a guard zone.
For the creation method of sector alarm, refer to 3-67P and Chapter 3.5.20 for the creation
method of sector alarm. .
5─12
5.2
EPA OPERATION
This section explains how to use the EPA function.
The EPA function is available when the ATA and ARPA options are not installed.
The EPA function stores/displays vectors as the courses and speeds of target ships.
The data of up to 10 target ships (plot/ID numbers 0-9) can be specified.
The EPA function calculates CPA/TCPA, and issues an alarm.
The data of plotted target ships is erased from memory when the power is turned off.
The EPA function does not display any past plot data.
* The same setting procedure for ATA/ARPA applies to the following settings.
procedure.
1. Vector Time
2. Past Position
3. CPA Limit
4. TCPA Limit
5. CPA Ring
5.2.1
See the ATA/ARPA setting
Plotting Targets
Vectors are displayed when a target is plotted twice.
A course and speed are calculated from the two plotting positions, and the plotted target moves in the course at
the speed.
The plot can be modified.
The plot number (target ID number) is not displayed while Display ID Number is set to OFF.
Procedures
Move the cross cursor mark onto the target on the radar display, and
press the [ACQ] key to start the first plotting.
Enter the plot number (target ID number), pressing the numeric key(s) [0]
to [9].
Press [ENT] to finish the first plotting.
The acquisition symbol and plot number will be displayed at the plotting position.
When 30 seconds to 15 minutes has passed after the first acquisition,
move the cross cursor mark onto the current target position, and take
steps 1 to 3 to perform the second plotting.
When finishing the second plotting, the system clears the symbol and plot number that
were displayed at the end of the first plotting, and displays the symbol (vector) and plot
number at the second plotting position.
The plotted target (symbol and plot/ID number) moves in a specified course at a specified
speed. The course and speed are calculated from the two plotting positions. At this
time, the CPA and TCPA at positions where the plotted target moves are calculated, and an
alarm is issued when the plotted target goes into the guard zone.
5─13
5.2 EPA OPERATION
5.2.2


Modifying Plotted Target Data
The system modifies specified plotted target data.
It clears the specified data, and displays the plotted target immediately before it moves to the clear position
until re-acquiring a target.
Procedures
Press the [ACQ] key.
Enter the plot number (target ID number) for modification, pressing the
numeric key(s) [0] to [9].
Press the [CLR] key.
The previously updated status will be displayed.
indicating that modification is in progress.
“M” is also displayed beside the mark,
Move the cross cursor mark to the modification position to re-acquire a
target.
At this time, specify the plot number you entered in step 2.
([ACQ], [0]-[9], [ENT])
5.2.3
Canceling Plotted Target Data
The system cancels the display of specified plotted target data.
Once plotted target data is canceled, it cannot be restored any more.
Procedures
Press the [ACQ] key.
Enter the plot number for cancellation, pressing the numeric key(s) [0] to
[9].
Press the [TGT CNCL] key.
The plotted target data of the specified plot number will be canceled.
Canceling all plotted targets
Procedures
Hold down the [TGT CNCL] key for 5 seconds or more.
The plotted targets of all the plot numbers will be canceled.
5─14
5.2.4
Displaying Numeric Data of Plotted Targets
The following data is displayed for a specified plotted target:
TGT ID
Plot number
BRG
Bearing:
0.1° unit
RANGE
Range:
0.1 nm unit
COURSE
Target’s true course:
0.1° unit
SPEED
Target’s true speed:
0.1 knot unit
CPA
CPA:
0.1 nm unit
TCPA
TCPA:
0.1 min unit
TIME
Elapsed time:
0.1 min unit
Procedures
Press the [TGT DATA] key.
Enter the plot number pressing the numeric keys [0] to [9].
Press [ENT] key.
The data of the specified plot number will be displayed.
The mark of the target for which numeric data is displayed is changed into “□”.
5─15
5.2 EPA OPERATION
5.2.5


Setting EPA Alarm (Audible Warning)
Alarm that may sound during the use of EPA can be set to ON/OFF.
Procedures
Press [ATA MENU] key.
Press [1] key.
1.
The EPA Setting menu will appear.
2.
Press [6] key.
3.
EPA alarm sound is switched ON or OFF.
ON: Sets the EPA alarm sound to ON.
OFF: Sets the EPA alarm sound to OFF.
4.
5.
6.
EPA Setting
Vector Time
6 min
Past Position
OFF
CPA Limit
10 nm
TCPA Limit
1 min
CPA Ring
ON
Audible Warning
ON
0. EXIT
Note: When this function turns off and CPA/TCPA alarm occurs, alarm does not sound.
maneuvering the ship.
5─16
Take care for
5.3
ATA/ARPA OPERATION
This section explains how to use the ATA and ARPA functions.
Each function is available only when the ATA or ARPA option is installed.
The functions automatically track a target, and store/display vectors as the course and speed.
They calculate CPA and TCPA, and issue an alarm.
The basic operations of ATA and ARPA are the same, but available functions are different.
The ATA function can track up to 30 ships; the ARPA function can track up to 100 ships.
Both functions set a guard zone for automatic acquisition.
The ARPA function permits the use of the trial maneuvering function (TRIAL). (The ATA does not.)
When the power is turned off or the transmit/standby mode is activated, tracking data is erased from memory.
5.3.1
Acquiring Target
Target acquisition can be performed on two modes, AUTO and MANUAL, and both modes can be used at the
same time.
Automatic Acquisition [AUTO]
Attention
l If untracked targets intrude into the guard zone in the
conditions that maximum number of targets is under
tracking, the targets acquired automatically will be
cancelled in the order of lower levels of danger.
Procedures
Press the [GZ ALARM] key.
Automatic acquisition will be started. The mark “
” and target ID number are put to
an acquired target, and they move together with the target. The vectors are displayed
within one minute.
Press the [GZ ALARM] key again.
Automatic acquisition will be turned off, and the guard zone disappears from the radar
display. However, automatically acquired ships are continuously tracked.
For the guard zone to be called by using the [GZ ALARM] key, refer to Section 5.1.6
Setting Automatic Acquisition Key Assignment.
* The guard zone can be called by using buttons 49 and 50 shown in the radar display on page 2-7.
5─17
5.3 ATA/ARPA OPERATION


Manual Acquisition [MANUAL]
Attention
l If more targets are acquired manually in the
condition that the maximum number of targets are
under tracking, the targets under tracking will be
cancelled in the order of lower level of danger in
order to track the manually acquired targets.
Procedures
Move the cross cursor mark onto the target to be acquired, and press the
[ACQ] key.
The target will be acquired. The initial acquisition mark and target ID number are put to
the acquired target, and the vectors are displayed within one minute.
Target manually captured.
The initial capture symbol is displayed.
Target that has intruded the zone for 1 min.
The capture symbol and vector are displayed.
When using only the manual acquisition mode alone, press the [GZ ALARM] key to turn
off the automatic acquisition mode.
Use of Automatic and Manual Acquisition Modes [ACQ AUTO] / [ACQ MANUAL]
Use the manual acquisition mode while the automatic acquisition mode is on.
Manually acquire the target to which particular attention should be paid, and get the other targets automatically
acquired. If a new target appears exceeding the maximum number of targets, the manually acquired target is
displayed even in the background until it gets out of the display. However, automatically acquired targets are
canceled starting far distance from own ship.
5─18
5.3.2
Canceling Unwanted Targets
Unwanted targets can be canceled one by one in the following cases:
· Tracking is no longer necessary for targets with which vectors/symbols are displayed after being acquired
and tracked.
· The number of vectors on the radar display needs to be reduced for easy observation.
When targets are to be re-acquired from the beginning, all the current vectors can also be canceled.
Canceling targets one by one
Procedures
Move the cross cursor mark onto the target to be canceled.
Press the [TGT CNCL] key.
The target’s vectors and symbols will disappear, and only the radar video remains.
Canceling all targets collectively
Procedures
Hold down the [TGT CNCL] key.
The vectors and symbols of all the targets will disappear, and only the radar videos
remain.
Note: When all the targets have been canceled, the system stops tracking them. Thus, you need to re-acquire
targets in manual or automatic acquisition mode. Do not cancel all the targets unless otherwise
required.
5─19
5.3 ATA/ARPA OPERATION
5.3.3


Displaying Target ID No. (Target Number Display)
A target ID number is a value displayed beside the acquisition symbol when a target is acquired.
ID numbers are assigned to targets in acquisition order. When the ATA function is used, ID numbers 1 to 30
are automatically assigned. When the ARPA function is used, ID numbers 1 to 100 are automatically assigned.
Each target is identified by the assigned ID number until it is lost or its acquisition is canceled.
Procedures
Press [ATA MENU] key.
Press [1] key.
The ATA Setting menu will appear.
Press [9] key.
The Target Number Display is switched ON or
OFF.
ON: Displays target ID numbers.
OFF: Hides target ID numbers.
ARPA TRACK: Displays target ID number
with ARPA track.
If there are many tracking targets and their
symbol display is confusing, set Target Number
Display to OFF to view the radar display easily.
ATA Setting
1. Vector Time
6 min
2. Past Position
OFF
3. CPA Limit
10 nm
4. TCPA Limit
1 min
5. CPA Ring
ON
6. Trial
＞
9. Target Number Display
ON
0. EXIT
Note: An ID number is always displayed for only targets with which numeric data is displayed.
5─20
5.3.4
ATA/ARPA Data Display
(Refer to Example of Display in page 2-1. )
Display of Vectors
Attention
l When a target or own ship changes a course, or when
a target is acquired, its vector may not reach a given
level of accuracy until three minutes or more has
passed after such course change or target
acquisition.
Even if three minutes or more has passed, the vector
may include an error depending upon the tracking
conditions.
A vector to represent a target’s predicted position can presented in the True vector or Relative vector mode.
each mode, a vector length can be freely changed for a time interval of 1 to 60 minutes.
In
The True and Relative vector can be switched by using buttons 47 shown in the radar display on page 2-7.
[I] Vector Mode Selection
True Vector Mode
In the true vector mode, the direction of a target vector indicates the true course of the target and its vector
length is proportional to its speed.
In this mode, own ship’s vector is displayed as shown below.
In this mode, the movements of other ships around own ship can be accurately and easily monitored.
However, no CPA RING can appear in this mode.
HL
Own Ship’s Vector
The relative vector is not displayed
True Vector
5─21
5.3 ATA/ARPA OPERATION


Relative Vector Mode
In displaying the relative vector of a target, press the [VECT R/T] key to select the Relative Vector mode.
The relative vector does not represent the true motion of the target, but its relative relation with own ship.
This means that a target with its relative vector directed to own ship (passing through the CPA LIMIT ring) will
be a dangerous target. In the Relative Vector mode, it can be seen at a glance where the CPA LIMIT of the
dangerous target is.
HL
The true vector is not displayed
CPA ring
Relative Vector
Therefore, the TRUE/REL mode shall optionally be used for the purpose of observation: the TRUE vector
mode for grasping the true aspect of a target, and the REL vector mode for grasping a target’s closest point of
approach (CPA)
5─22
[II] Vector Length: VECTOR TIME
The vector length of a target is proportional to its speed, and the vector time can be switched in a range of 1 to
60 minutes by used for ten-key.
The diagram below illustrates a vector length of a target for six minutes, and the tip of the vector represents the
target’s position expected to reach six minutes later.
HL
Current Position
Future Predicted Position
(6 min later in this example)
Refer to Section 5.1.4 Setting Vectors for how to change the vector time.
5─23
5.3 ATA/ARPA OPERATION


Display of Past Positions [PAST POSN]
Procedures
Press [ATA MENU] key.
Press [1] key.
The ATA Setting menu will appear.
Press [2] key.
The Past Position screen will appear.
Select the past position display
interval to be set, pressing the
numeric key.
The selected past position display interval will
be set.
OFF: Hides past positions.
Time/Range: Past positions are displayed at the
set intervals.
ATA Setting
1. Vector Time
6 min
2. Past Position
OFF
3. CPA
1. Limit
OFF
2. 0.5 min 10 nm
4. TCPA
3. Limit
1 min
4. 2 min
1 nm
5. CPA
5. Ring
4 min
6. 0.1 nm
ON
6. TRIAL
7. 0.2 nm
8. 0.5 nm
9. 1 nm
9. Target Number Display
ON
0. EXIT
The ATA/ARPA Past Position function can display up to 6 past positions of a target. The display interval can
be set to specified time intervals of 0.5, 1, 2, or 4 minutes, or specified range intervals of 0.1, 0.2, 0.5, or 1 nm.
The specified interval is shown on the right of PAST POSN in the ARPA information display area. When OFF
is shown, Past Position is set to OFF in the menu.
Switching between the True and Relative Vector modes takes place
at the same time the vector mode is switched. In relative mode,
target’s relative tracks displayed.
5─24
HL
An example of display is shown in Fig. 5-4
Guard Zone
Lost Target
Target intruding the Guard Zone
HL
Trackball (Cursor Mark)
Dangerous Target
Past Positions
(Changed Course)
Untracked Target
NAV Lines
Past positions
Safe Target
(Straight Course)
Fig. 5-4
Example of Display (in North-up and True Vector mode)
In addition to the marks and symbols shown above, fixed/variable range markers, electronic bearing lines, etc.
are presented on an actual video.
5─25
5.3 ATA/ARPA OPERATION
5.3.5


Target Data Display
Attention
l When a target or own ship changes its course, or when a new
target is acquired, its vector may not reach a given level of
accuracy until three minutes or more has passed after such
course change or target acquisition.
Even if three minutes or more has passed, the vector may
include an error depending upon the. tracking conditions.
Type of Data Display
Target Data
Target identification (TGT ID)
ID number of the target
True bearing: BEARING
0.1° unit
Range: RANGE
0.1 NM unit
True course: COURSE
0.1° unit
True speed: SPEED
0.1 knot unit
Closest point of approach (CPA)
0.1 NM unit
Time to CPA (TCPA)
0.1 min unit
Bow crossing range (BCR)
0.1 NM unit
Bow crossing time (BCT)
0.1 min unit
The target for which its numeric data is displayed is marked with a symbol “
” to distinguish from other
targets.
If a target’s data is displayed, but without the symbol “
”, such a target exists outside the currently displayed
radar display.
[I]
Method of Displaying Target Data [TGT DATA]
Procedures
Move the cross cursor mark onto the target for which numeric data is to
be displayed, and press the [TGT DATA] key.
Then, the data of the designated target will appear, it will be marked with a symbol “
”.
The target data will remain on the radar display until the target is lost and its vector
disappears, or until another target is designated.
If a target with the mark “
” is designated, only its true bearing (BEARING) and range
(RANGE) will appear until its vector appears.
* Buttons 51 and 52 on the radar display on page 2-7 are available to switch target numbers of numeric data.
5─26
[II] Input of target information (ATA Target INFO)
This radar enables name inputs and target track color changes for individual ATA/ARPA targets acquired.
* EPA is not available to make this setting.
Procedures
Turn OFF the cursor mode.
Button 19 on the radar display is available to change the cursor mode.
Place the cursor over the target and then press [CLR/INFO] key.
The ATA Target INFO screen opens.
* This function is available only when the cursor mode is set to OFF.
Target information screen
Item overview
ATA Target INFO
Target ID:
Name:
Target ID currently selected.
The name of the target. It is
blanked in the initial status. The
user is to enter a name.
Track Color: Determines a target track color.
Target ID
1. Name
2. Track Color
0. EXIT
5─27
5.3 ATA/ARPA OPERATION


Name entry (Name)
Procedures
While the ATA Target INFO screen is
open, press [1] key.
For the entry of a new name
® 2. INPUT
For the selection of a name from
names that have already been
entered
® 1. DATA BASE.
ATA Target INFO
Target ID
1. Name
1. DATA BASE
2. INPUT
2. Track
Color
3. OFF
0. EXIT
For new entry
Name
Selecting INPUT displays the screen shown
below.
After making an entry, place the cursor over
[ENT] key and then press it.
When the name entered with INPUT is
changed to a target name, it is saved in DATA
BASE.
* Up to eight characters can be entered as a
name.
DEL
5 6 7 8 9
F G H I J
P Q R S T
Z SP ＜ ＞
BS
ENT
EXIT
For calling a name from the names that have been entered
Selecting DATA BASE lists INPUT names that have already been entered.
select a name you want to use.
* Names for 30 ships can be saved in DATA BASE.
5─28
From the list,
Track Color Setting (Track Color)
Procedures
While the ATA Target INFO screen is
open, press [2] key.
Pressing numeric key(s), select a
color number you want to set.
Target ID
Colors selectable with Track Color are colors
that have been set within the ATA Track Setting.
When colors are set, individual colors can be
set for 10 ships. For the 11th to 20th ships, 10
ships are to be set collectively.
1. Name
On this screen, selection of the 1st track is to
select CYAN.
For target tracks, up to 20 ships can be
displayed.
For color settings selected with Track Color,
see page 5-45 in Section 5.3.9.
ATA Target INFO
2. Track Color
1.
2.
3.
4.
5.
6.
7.
8.
9.
0. EXIT
5─29
OFF
1-CYAN
2-WHITE
3-BULE
4-GREEN
5-YELLOW
6-RED
7-PINK
NEXT Page
5.3 ATA/ARPA OPERATION
5.3.6


Alarm Display
The ATA/ARPA system provides the following alarms:
Dangerous target alarm:
CPA/TCPA
Guard zone entry alarm:
GZ
Lost target alarm:
LOST
System function alarm:
ARPA (DATA)
Gyro set alarm:
SET GYRO
Dangerous Target Alarm
CAUTION
Since these alarms may include some errors
depending on the target tracking conditions, the
navigation officer himself should make the final
decision for ship operations such as collision
avoidance.
Making the final navigation decision based only on
the alarm may cause accidents such as collisions.
In the ARPA system, targets are categorized into two types: tracked targets and dangerous targets.
The grade of danger can easily be recognized on the display at a glance. So the officer can easily decide
which target he should pay attention to.
The types of target and alarm are shown below.
Dangerous Target Alarm
Status
Symbol on display
Alarm characters
Alarm sound
Tracking target
¡
（OFF）
(OFF)
Conditions
· CPA>CPA LIMIT
· 0>TCPA
· TCPA>TCPA LIMIT
Dangerous target
TCP/TCPA
Beep sound (pee-poh)
Acknowledgeable
· CPA£CPA LIMIT,
0£TCPA£TCPA LIMIT
CPA LIMIT and TCPA LIMIT: The Setting Values
5─30
Guard Zone Alarm
CAUTION
In setting a guard zone, it is necessary to adjust
the gain, sea clutter suppression and rain/snow
clutter suppression to ensure that target echoes
are displayed in the optimum conditions.
No
guard zone alarms will be issued for targets
undetected by the radar, and this may cause
accidents such as collisions.
The guard zone functions are to set a zone at an arbitrary range and to deliver an alarm if any target intrudes
within this zone.
For the method of setting a guard zone, refer to page 3-60, section 3.5.19 Set Guard Zones.
HL
Guard Zone
Guard Zone Alarm
Status
Target entering
the guard zone
Symbol on display
Alarm characters
Alarm sound
Conditions
GZ
Beep sound (pipipi)
Acknowledgeable
An alarm sound is generated
while a target has entered into
the range of 0.5 NM between
the outer and the inner ring.
5─31
5.3 ATA/ARPA OPERATION


Lost Target Alarm
Attention
l If the gain, sea clutter suppression, rain/snow clutter
suppression are not adjusted adequately, the lost
target alarm may be easily generated.
So such
adjustments should be mad carefully.
When it is impossible to continue tracking any acquired and tracked target, the LOST target alarm will be
generated. The typical causes for alarm generation are shown below, but not limited to the following:
· The target echo is very weak.
· The target is shadowed by a shore or a large ship and its echo is not received.
· The target echo is blurred by sea clutter returns.
HL
Lost Target
Lost Target Alarm
Status
Lost target
Symbol on display
Alarm characters
LOST
5─32
Alarm sound
Conditions
Beep sound (pee)
The alarm will sound once
when a lost target symbol is
displayed.
Acknowledgeable
System Function Alarm
When an abnormal state of an input signal or a trouble in the processing circuitry occurs, an character or alarm
is generated. When an alarm occurs against any ARPA function, ARPA (DATA) will appear in the WARNING
display area, but no indication is made in the ARPA information display. This status means that there is any
operational trouble in the ARPA system. Please, contact the service depot or the manufactures.
System Function Alarm
Alarm characters
Alarm sound
Conditions
ARPA(DATA)
Beep sound (pipipi)
An alarm sound is generated when an ARPA circuit error
occurs.
Gyro Set Alarm
The North Stabilizing Kit (NSK) in this system receives signals from a gyro. Even if the power is turned off,
the system will follow up the gyro. However, the system stops the follow-up operation when the power of the
master gyro is turned off or when any trouble occurs to the line. When the power of the master gyro is
recovered, the SET GYRO alarm will be generated.
If this alarm occurs, set the gyro.
Gyro Set Alarm
Alarm characters
Alarm sound
SET GYRO
Beep sound (pipipi)
Conditions
The signals from the gyro are stopped, but the gyro is
recovered.
5─33
5.3 ATA/ARPA OPERATION
5.3.7


Trial Maneuvering (Trial)
Attention
l Trial maneuvering is to simulate own ship’s course
and speed in the conditions that the course and
speed of a target ship are unchanged as they are.
As the situation is different from any actual ship
maneuvering, set values with large margins to CPA
Limit and TCPA Limit.
Attention: Trial maneuvering can be done only when the ARPA option is installed.
unavailable if the ATA option is installed.
Trial maneuvering is
The trial maneuvering is the function of simulating own ship’s course and speed for collision avoidance when a
dangerous target appears. When manually entering own ship’s course and speed against the data of the
acquired target, it is checked whether the situation is dangerous or not.
The ranges of course and speed to be entered manually:
Course: 360° (in 0.1° intervals)........................................................................... [EBL] control
Velocity: 0 to 100 knots (in 0.1 knot steps)........................................................... [VRM] control
5─34
Trial Maneuvering in the True Vector Mode
In the True Vector mode, calculations are performed according to the values set by Trial Speed and Trial Course,
and the result is displayed as a bold-line that represents the change of own ship’s vector as shown in the figure
below (an example of the course changed to the right).
In this figure, the dangerous target forward right becomes safe as a result of simulation.
The target data display field indicates the current CPA LIMIT and TCPA LIMIT values regardless of the result
of simulation.
Dangerous target
HL
NORMAL
Own ship
Change of symbol as a result of trial maneuver
TRIAL
HL
Change in course
Own ship
Trial Speed (vector time)
5─35
5.3 ATA/ARPA OPERATION


Trial Maneuvering in the Relative Vector Mode
The result of Trial maneuvering in the Relative Vector mode is shown by a change in target vector. In the
figure below (in the same conditions as in the True Vector mode in the previous page), it is seen that the
acquired target is a dangerous one because its vector is crossing the CPA RING.
Dangerous target
HL
NORMAL
CPA RING
Own ship
Change of symbol as a result of Trial maneuver
HL
TRIAL
Change in course
Own ship
CPA RING
The above figure shows that the relative vector of the target has changed as shown in the figure as a result of
simulation (course and speed), so that the target’s symbol is changed into “¡”, a safe target.
The data display field indicates the current values of CPA LIMIT and TCPA LIMIT, not those as the result of
simulation, same as in the True Vector mode.
The course change of own ship is displayed as a dotted-lime.
5─36
Executing the TRIAL Function
Procedures
Press [ATA MENU] key.
Press [1] key.
1. Trial
Press [6] key.
2. Course
OFF
The TRIAL Menu will appear.
Trial
000.0°
3. Speed
Press [1] key.
20.0 kts
“Trial” will be set to “ON” and a character “T”
blinks under own ship’s mark on display to
indicate the trial maneuvering mode.
Set a course by rotating the [EBL]
control and a speed by rotating the
[VRM] control.
As the symbol of plot data, dangerous
” and a safe
target is marked with “
target with “¡“.
0. EXIT
Exit
Press [1] key.
“Trial” will be set to “OFF” and the normal display will be restored.
5─37
5.3 ATA/ARPA OPERATION
5.3.8


ATA/ARPA Simulation
CAUTION
Simulation is a function to check whether the
ATA/ARPA system is operating normally.
Do not
use this function except when checking the
ATA/ARPA operation.
In particular, if this mode is used during
navigation, pseudo targets appear on the radar
display, which may be confused with the actual
targets.
Do not use this mode during navigation.
Otherwise, this may cause accidents.
The following simulation to be used for ATA/ARPA can be referred to and modified:
[I]
[II]
Test Video:
ATA Simulator:
[III]
[IV]
Status:
Gate Display:
Test video for use in checking the operation of the target detection circuit.
Pseudo targets are generated on the radar display to check whether the ARPA
functions are operating normally.
Displays the ATA status.
Gate size to acquire and track targets.
5─38
[I] Test Video
Attention
l TEST VIDEO may not appear for targets that are not
acquired nor tracked, or if the [GAIN] and [SEA]
controls are adjusted properly
Test Video is used to check whether the video signals under target acquisition and tracking are inputted to and
processed in the target processing circuit normally.
However, it is sufficient to check that VDH in TEST VIDEO is displayed.
The start of the Test Video mode is available only in the Standby mode.
Procedures
Press [STBY] key.
The equipment will enter the standby state.
Press [ATA MENU] key.
Press [5] key.
The ATA Test Menu will appear.
Press [1] key.
The Test Video setting screen will appear.
ATA TEST MENU
1. Test Video
OFF
1. Simulator
OFF
2. ATA
2. VDG
OFF
3. VDH
3. Status
4. VDL
5. Display
VDIN
4. Gate
OFF
Press a numeric key to select a video
signal you want to set.
The selected test video will be set.
The test video is displayed in the background of
the radar display.
In general, VDH is sufficient for target
display checks in test video mode.
0. EXIT
If any target displayed clearly in the radar display is not displayed in the Test Video mode, the target detection
circuit of the ARPA system may have a trouble.
5─39
5.3 ATA/ARPA OPERATION


[II] ATA Simulator
Pseudo targets can be generated in certain known positions to check whether the ARPA processing circuits are
operating normally. Since the pseudo targets move depending on known parameters, the values for these
pseudo targets can be compared with the known value if the pseudo targets are acquired and tracked, and
displayed. Thus, it can be checked if the ARPA system is operating normally.
Procedures
Press the [STBY] key.
The equipment will enter the standby state.
Press [ATA MENU] key.
Press [5] key.
The ATA Test Menu will appear.
Press [2] key.
The ATA Simulator screen will appear.
Select the simulator to be set,
pressing the numeric key.
ATA TEST MENU
1. TEST Video
OFF
2. ATA Simulator
OFF
3. Status
1. OFF
2. SCENARIO1
4. Gate
3. Display
SCENARIO2
OFF
4. SCENARIO3
5. SCENARIO4
6. SCENARIO5
7. SCENARIO6
The selected simulator will be set.
Press the [TX/PRF] key.
The simulator will be activated and generate
pseudo targets. The characters "XX" at the
bottom of the radar display blinks indicating
that the simulation mode is active.
0. EXIT
ARPA simulator/scenario
TARGET START POINT
SCENARIO
DISTANCE BEARING
3.2NM
10°
6NM
0°
6NM
every 18°
TARGET END POINT
DISTANCE BEARING
1NM
90°
0NM
0°
1NM
every 18°
TARGET SPEED
20kts
10kts
10kts
6NM
45°
1NM
45°
105kts
6NM
6NM
45°
45°
6NM
6NM
150°
150°
20kts
20kts
Note: When the range between own ship and the pseudo target is 0, the target will disappear.
5─40
Exit
Press the [STBY] key.
The equipment will enter the standby state.
Press [2] key while the ATA Test Menu is open.
The ATA Simulator screen will appear.
Press [1] key to select OFF.
The ATA Simulator is turned off.
5─41


5.3 ATA/ARPA OPERATION
[III] Status
The current ATA/ARPA status will appear.
Procedures
Press [ATA MENU] key.
The ATA Menu will appear
Press [5] key.
Status
* Constant
* Video Level TD
15
* Video Level HI
* Video Level Low
The ATA Test Menu will appear.
Press [3] key.
The Status screen will appear..
*Constant:
*Video Level TD:
*Video Level HI:
*Video Level Low:
*Gate Size:
*Tracking:
Vector response
Threshold value used for
tracking
VD threshold value used
for guard zone
Unused
Size of gate used for
tracking
Number of targets
currently acquired
* Gate Size
* Tracking
0. EXIT
5─42
NARROW
[IV] Gate Display
The gate displays an area monitoring a target using the ATA/ARPA function. This radar equipment allows the
gate size to change automatically according to target distance and size. User can check the gate size using the
following function.
Procedures
ATA TEST MENU
1. TEST Video
OFF
2. ATA Simulator
OFF
3. Status
Press [ATA MENU] key.
Press [5] key.
The ATA Test Menu will appear.
Press [4] key.
The gate display mode is switched.
ON: Gate is displayed
OFF: Gate is not displayed
4. Gate Display
OFF
The gate displays data of a target you
want to check using the cursor and
[TGT DATA] key. (See Section 5.3.5
Target Data Display.)
The data is displayed, and the gate is displayed
around the ATA/ARPA symbol in green.
Note: The ATA/ARPA function can display the gate of two targets
simultaneously.
0. EXIT
Vector
ARPA/ATA symbol
Echo
Gate (displayed in green)
5─43
5.3 ATA/ARPA OPERATION
5.3.9


Setting ATA/ARPA Tracks (ATA Track Setting)
Track information on acquired ATA/ARPA targets can be set.
This radar can acquire target tracks of up to 20 ships.
[I] Turning ON/OFF the target track function (Track Function)
Procedures
Press [ATA MENU] key.
Press [3] key.
The ATA Track Setting Menu will appear.
Press [1] key.
The ATA/ARPA Track function is switched
between ON and OFF.
ON: Sets the ATA/ARPA Track function to
ON.
OFF: Sets the ATA/ARPA Track function to
OFF.
ATA Track Setting
1. Track Function
ON
2. Track Color
3. Track Display
4. Track Memory Interval
3 sec
5. Clear Track Color
WHITE
6. Clear Track Number
WHITE
7. Card2 Track Display
0000
0. EXIT
* When this function turn off, all target track functions to OFF(Including track memory), If so, checking
cannot be done later.
5─44
[II] Setting target track colors (Track Color)
The same color can be selected for all target tracks, or different colors can be set to ships whose track numbers
are 1 to 10. In such cases, 10 ships, whose track numbers are 11 to 20, are to be set collectively.
Procedures
Press [2] key while the ATA Track
Setting Menu is open.
1. All
Track color can be set.
Track Color
INDIVIDUAL
Press [1] key.
Which is to be selected, setting individual colors
or setting the same color for all ships, is to be
determined depending on the setting for the ALL
item.
Setting individual colors: Select INDIVIDUAL
Setting the same color for all ships:
Select a color number
INDIVIDUAL
1.Track
2. ATA
No.1
2. WHITE YELLOW
3.Track
CYAN
3. ATA
No.2
4. BLUE GREEN
5.Track
GREEN
4. ATA
No.3
6. YELLOW PINK
7. Track
PINK
5. ATA
No.4
8. RED
RED
9.
NEXT
6. ATA Track No.5
WHITE
For setting individual colors
Selecting INDIVIDUAL makes it effective to set track numbers
from ATA Track No.1 to ATA Track No.10 as well as individual
settings for Other. Set a color for each target.
When pressing the item number of the target to be set displays a
list of colors, select desired colors from the list.
Eight colors are selectable: OFF, WHITE, CYAN, BLUE,
GREEN, YELLOW, PINK and RED.
7. ATA Track No.6
OFF
8. ATA Track No.7
9. NEXT
CYAN
0. EXIT
ATA Track No.1 to
ATA Track No.10: 1st ship to 10th ship
Other: 11th ship to 20th ship
Settings are made as shown above.
* Note that individual settings are effective only when INDIVIDUAL has been set.
For setting the same color for all ships
This setting is determined when you select a color displayed with ALL selected.
the same as those to be used for setting individual colors.
5─45
The types of colors are
5.3 ATA/ARPA OPERATION


[III] Setting Display of Target Tracks (Track Display)
The display of target tracks can be set to ON/OFF.
all ships or for individual ships can be made.
Procedures
For the display of tracks, setting for display/nondisplay of
Press [3] key while the ATA Track
Setting Menu is open.
Track Display
1. All
Track display can be set.
Press [1] key.
Which is to be selected, setting individual
tracks or display/nondisplay for all ships, is to
be determined depending on the setting for the
ALL item.
Setting individual tracks: Select INDIVIDUAL
Setting display for all ships: Select ON
Setting nondisplay for all ships: Select OFF
INDIVIDUAL
INDIVIDUAL
1. Track
2. ATA
No.1
2. ON
ON
3.
OFF
3. ATA Track No.2
ON
4. ATA Track No.3
ON
5. ATA Track No.4
ON
6. ATA Track No.5
ON
7. ATA Track No.6
For setting individual tracks
Selecting INDIVIDUAL makes it effective to set track numbers
from ATA Track No.1 to ATA Track No.10 as well as individual
settings for Other. Select display/nondisplay for each target.
Each time ON/OFF window is pressed, a decision branch is
switched to another.
ON
8. ATA Track No.6
ON
9. NEXT
0. EXIT
ATA Track No.1 to
ATA Track No.10: 1st ship to 10th ship
Other: 11th ship to 20th ship
Settings are made as shown above.
* Note that individual settings are effective only when INDIVIDUAL has been set.
5─46
[IV] Setting target track memory intervals (Track Memory Interval)
Target track memory intervals can be set.
* Note that this function is available only when the Target Track function is set to ON.
Procedures
Press [4] key while the ATA Track
Setting Menu is open.
The Track Memory Interval setting items are
displayed.
Select a number for a memory interval
you want to set.
Settable intervals
Select from the following intervals:
OFF, 3 sec, 5 sec, 10 sec, 30 sec, 1 min, 3 min, 5
min, 10 min, 30 min, 60 min, 1 nm, 3 nm, 5 nm
and 10 nm
* Setting this function to ON saves target tracks
even though Target Display is set to OFF.
ATA Track Setting
1. Track Function
2. Track Color
3. Track Display
4. Track Memory Interval
3 sec
5. Clear
OFF Color
1. Track
2. 3 sec WHITE
3. Track
5 secNumber
6. Clear
4. 10 sec 0000
5.
30 sec
7. Card2 Track
Display
6. 1 min
0000
7. 3 min
8. 5 min
9. NEXT
0. EXIT
5─47
5.3 ATA/ARPA OPERATION
[IV]


Erasing target tracks (Clear Track)
Target tracks can be erased.
number setting.
You can select an erasing method by color setting or an erasing method by track
Erasing tracks by color setting (Clear Track Color)
Procedures
Press [5] key while the ATA Track
Setting Menu is open.
Select the number of the color you
want to erase.
ATA Track Setting
1. Track Function
2. Track Color
3. Track Display
4. Track Memory Interval
3 sec
5. Clear Track Color
WHITE
ALL Number
1. Track
6. Clear
2. WHITE WHITE
3. Track
CYANDisplay
7. Card2
4. BLUE
0000
5. GREEN
6. YELLOW
7. PINK
8. RED
9. NEXT
0. EXIT
5─48
Erasing tracks by track number (Clear Track Number)
Procedures
Press [6] key while the ATA Track
Setting Menu is open.
Select the track number you want to
erase.
ATA Track Setting
1. Track Function
2. Track Color
3. Track Display
4. Track Memory Interval
3 sec
5. Clear Track Color
WHITE
6. Clear Track Number
7. Card2
1.
2.
3.
4.
5.
6.
7.
0. EXIT
8.
9.
5─49
Track
ALL Display
ATA Track0000
No.1
ATA Track No.2
ATA Track No.3
ATA Track No.4
ATA Track No.5
ATA Track No.6
ATA Track No.7
NEXT Page
5.3 ATA/ARPA OPERATION
[V]


Reading target track saved in CARD2 (Card2 Track Display)
Saved target tracks can be read from CARD2.
Reading targets by color setting
Procedures
Press [7] key while the ATA Track
Setting Menu is open.
Enter the number you want to read
with the numeric key, and then press
the ENT key.
* For how to save targets in CARD2, see page 3-131, section 3.12.1.
ATA Track Setting
1. Track Function
2. Track Color
3. Track Display
4. Track Memory Interval
3 sec
5. Clear Track Color
WHITE
6. Clear Track Number
7. Card2 Track Display
0000
0. EXIT
5─50
5.4
AIS OPERATION
Attention
There are the following limitations on use of the AIS function,
system, and operation:
[I]
This system can display a maximum of 50 AIS targets.
There
are two types of filters for increasing the display priority.
(Refer to Section 5.4.6 AIS FILTER SETTING.)
[II] Keep in mind that the following restrictions are placed on use
of the AIS function:
1) The AIS function cannot be turned on in the following cases:
· MANUAL is selected for the speed sensor.
· LOG or 2-axis LOG is used for the speed sensor, and SET
and DRIFT are selected.
2) LOG or 2-axis LOG cannot be selected for the speed sensor in
the following case:
· SET or DRIFT is set while the AIS function is on.
3) MANUAL cannot be selected for the speed sensor in the
following case:
· The AIS function is on.
4) SET/DRIFT (current offset) cannot be turned on in the following
case:
· The AIS function is turned on, and LOG or 2-axis LOG is
selected for the speed sensor.
* Use of this function requires AIS I/F (option).
5─51
5.4 AIS OPERATION
5.4.1


Initial Setting
This section explains the initial setting for using the AIS function.
Setting the GPS antenna location
Set the GPS antenna location. Set offset ranges in longitudinal direction and latitudinal direction from the
own ship's reference position.
For the setting procedure, refer to Section 8.5 ADJUSTMENT.
Attention
l If offset ranges are not set correctly, AIS symbols and
radar echoes may be displayed shifted.
l When offset ranges are set, latitude and longitude
data received from the GPS is offset, and the offset
data is displayed as the latitude and longitude of own
ship’s position.
Setting collision decision criteria (CPA Limit/TCPA Limit)
The collision decision criteria for the ATA/ARPA function are applied to the AIS function.
For the setting procedure, refer to Section 5.1.3 Setting Collision Decision Criteria.
The AIS setting menu is also available for the collision decision criteria. Note that the same collision decision
criteria must apply to ATA and ARPA.
Attention
l Set the optimum values of collision decision
conditions, depending upon vessel type, water area,
weather, and oceanographic conditions.
5─52
Procedures
Press [ATA MENU] key.
Press [2] key.
The AIS Setting Menu will appear.
Press [4] key.
The ten-key screen will appear.
Using numeric keys, enter the CPA
value you want to set, and then press
[ENT] key.
The entered CPA Limit value is determined.
Press [5] key.
The ten-key screen will appear.
AIS Setting
1. AIS Function
OFF
2. AIS Symbol Display
OFF
3. ATA Symbol Display
ON
4. CPA Limit
1 nm
5. TCPA Limit
1 min
6. AIS Filter Setting
7. Identical Distance
100 m
Using numeric keys, enter the TCPA
value you want to set, and then press
[ENT] key.
The entered TCPA Limit value is determined.
0. EXIT
* The collision decision criteria set on the AIS side are also available on ATA/ARPA.
5─53
5.4 AIS OPERATION
5.4.2


Setting AIS Display Function (AIS Function)
Switch the AIS symbol display function to ON/OFF.
Attention
l When the AIS display function is set to OFF, no AIS
symbols are displayed.
l The AIS display function itself is turned OFF.
l Once the AIS display function is set to OFF, it is not
automatically switched to ON even if a dangerous
target exists.
Procedures
Press [ATA MENU] key.
Press [2] key.
The AIS Setting menu will appear.
Press [1] key.
The AIS Function is switched between ON and
OFF.
ON: Enables the AIS display function.
OFF: Disables the AIS display function.
AIS Setting
1. AIS Function
OFF
2. AIS Symbol Display
OFF
3. ATA Symbol Display
ON
4. CPA Limit
1 nm
5. TCPA Limit
1 min
6. AIS Filter Setting
7. Identical Distance
100 m
0. EXIT
* Button 25 on the radar display on page 2-7 is also available to switch the display functions.
* Note that turning OFF this function switches all AIS display functions to OFF.
5─54
5.4.3
Activating AIS Targets
Activate an AIS target, and display the target’s vector and make a collision decision.
Manual activation
Activate an AIS target*1 in manual mode to display the vector and HL.
Procedures
Press the CURSOR button at the upper right of the radar display
several times until ACT AIS appears.
The cursor mode is set to the AIS activation mode.
Move the cross cursor mark onto the inactive AIS target that is to be
activated*1, and press [ENT] key.
The selected AIS target will be activated*1.
Automatic activation
Activate an AIS target in automatic mode to display the vector and HL.
If the guard zone function is in use, an AIS target is activated automatically when it has entered the guard zone.
Dangerous targets are also activated automatically.
The guard zone is the same as for ATA/ARPA. For the setting procedure, refer to “Setting Guard Zone” in 3.4
BASIC OPERATION of the instruction manual.
Reference
*1
If an AIS target is activated but the vector is not displayed, refer to Section 5.4.5 Setting AIS
Symbol Display.
For activation of targets, refer to Section 5.1.2 Definitions of Symbols.
5─55
5.4 AIS OPERATION
5.4.4


Deactivating AIS Targets
Deactivate an AIS target*2 and clear the display of the vector and HL.
Attention
l The operation above is effective only for active
targets.
Procedures
Press the CURSOR button at the upper right of the radar display
several times until CANCEL appears.
The cursor mode is set to the deactivation mode.
Move the cross cursor mark onto the active AIS target that is to be
deactivated*2, and press [ENT] key.
The selected AIS target will be deactivated*2 .
*2
For deactivation of targets, refer to Section 5.1.2 DEFINITIONS OF SYMBOLS.
5─56
5.4.5
Setting AIS Symbol Display Function (AIS Symbol Display)
Switch ON or OFF to set the AIS symbol display function.
Procedures
Press [ATA MENU] key.
Press [2] key.
The AIS Setting menu will appear.
Press [2] key.
The AIS Symbol Display is switched between
ON and OFF.
ON: Enables the AIS symbol display
function.
OFF: Disables the AIS symbol display
function.
AIS Setting
1. AIS Function
OFF
2. AIS Symbol Display
OFF
3. ATA Symbol Display
ON
4. CPA Limit
1 nm
5. TCPA Limit
1 min
6. AIS Filter Setting
7. Identical Distance
100 m
0. EXIT
* Button 26 on the radar display on page 2-7 is also available for switching.
5─57
5.4 AIS OPERATION
5.4.6


Displaying Numeric Data of AIS Targets
Display the numeric data of active AIS targets.
Types of numeric data displayed
There are two modes (simple and detail) to display the numeric data of AIS targets.
different between the two modes.
Display Item
Detail mode
Simple mode
NAME (ship name)
Up to 20 characters
CALL SIGN
Up to 7 characters
MMSI
Up to 9 characters
COG (course over ground)
0.1° unit
SOG (speed over ground)
0.1 knot unit
CPA (closest point of approach)
0.1 nm unit
TCPA (time to CPA)
0.1 min unit
BRG (true bearing)
0.1° unit
RANGE
0.1 nm unit
HDG (heading bearing)
0.1° unit
ROT (course change speed)
0.1°/min
L/L (latitude/longitude)
0.001’ unit
The display items are
Not displayed
The detail mode displays the numeric data of only a single ship; the simple mode can display the numeric data
of up to three ships.
Displaying numeric data
Procedures
Press the CURSOR button at the upper right of the radar display
several times until
TGT DATA appears.
The cursor mode is set to the numeric data display mode.
Move the cross cursor mark onto the active AIS target for which numeric
data is to be displayed, and press [ENT] key.
The values of the selected AIS target will appear on the right side of the radar display.
The mark
is displayed around the symbol.
Reference: If the values are displayed but the mark
radar display.
5─58
. is not on the radar display, the target is outside the
Clearing numeric data
Procedures
Press the CURSOR button at the upper right of the radar display
several times until TGT DATA appears.
The cursor mode is set to the numeric data display mode.
Move the cross cursor mark onto the active AIS target for which numeric
data is to be cleared, and press [CLR] key.
The values of the selected AIS target will be cleared from the right side of the radar
display, and the mark
displayed around the symbol will also disappear.
Selecting the detail/simple mode to display numeric data
Move the pointer to the button W, W at the upper right of the AIS target’s
numeric data display area, and press [ENT] key.
The detail mode or the simple mode is switched each time the button is
clicked.
Procedures
Switched each time
the button is clicked
Display sample in simple mode
Display sample in detail mode
5─59
5.4 AIS OPERATION
5.4.7


Setting ATA/ARPA Symbol Display Function
(ATA Symbol Display)
Set the ATA/ARPA symbol display function to ON/OFF.
This function is effective only when the AIS display function (option) is set to ON.
This function is unavailable when the AIS display function is set to OFF.
This function holds data even though the ATA/ARPA display is set to OFF.
For the AIS display function, see Section 5.4.2 on page 5-54.
Procedures
Press [ATA MENU] key.
Press [2] key.
The AIS Setting menu will appear.
Press [3] key.
The ATA/ARPA Symbol Display Function is
switched ON or OFF.
ON
Enables the ATA/ARPA symbol display
function.
OFF: Disables the ATA/ARPA symbol display
function.
AIS Setting
1. AIS Function
OFF
2. AIS Symbol Display
OFF
3. ATA Symbol Display
ON
4. CPA Limit
1 nm
5. TCPA Limit
1 min
6. AIS Filter Setting
7. Identical Distance
100 m
0. EXIT
* Button 27 on the radar display on page 2-7 is also available to switch between ON and OFF.
5─60
5.4.8
Setting AIS Filter (AIS Filter Setting)
About an AIS filter
The setting of an AIS filter enables the priority display of AIS targets in the area. The filter is initially set in a
circle having a radius of 20 [nm] from the own ship’s position. If 51 or more targets exist in the filter range,
they are displayed according to the priority explained in Section 5.4.11 Displaying AIS Symbols - Maximum
number of targets and the display priority.
Type of AIS filters (Filter Type)
There are the following three types of AIS filters:
1) RANGE........ A filter is set in a circle with a set range as the radius.
2) SECTOR ...... A filter is set in a sector formed by two bearings with the bow as reference.
3) ZONE........... A filter is set in a zone formed by two bearings and two ranges with the bow as reference.
Procedures
Press [ATA MENU] key.
Press [2] key.
Press [6] key.
The ATA Filter Setting menu will appear.
Press [1] key.
AIS Filter Setting
1. Filter Type
RANGE
2. Make
RANGE
Filter
1. AIS
2. SECTOR
3. Filter
3. Display
ZONE
ON
The Filter type selection screen will appear.
Select the AIS filter type to be set,
pressing the numeric key.
The selected AIS filter type will be
determined.
0. EXIT
5─61
5.4 AIS OPERATION


Making an AIS filter (Make AIS Filter)
Procedures
Press [2] key while the ATA Filter
Setting menu is open.
The Make AIS Filter screen will appear.
[I] Setting a RANGE filter
Turn the [VRM] key control to set a
filter range, and press [ENT] key.
AIS Filter Setting
1. Filter Type
RANGE
2. Make AIS Filter
3. Filter Display
ON
The range of a RANGE filter will be set.
AIS targets in the set circle are displayed by
priority.
[II] Setting a SECTOR filter
Turn the [EBL] key control to set the
bearing of the port side, and press
[ENT] key.
Turn the [EBL] key control to set the
bearing of the starboard, and press
[ENT] key.
0. EXIT
A SECTOR filter will be set.
AIS targets in the area formed by the two set bearings are displayed by priority.
[III] Setting a ZONE filter
Turn the [EBL] key and [VRM] key controls to set the bearing and range
of the port side, and press [ENT] key.
Turn the [EBL] key and [VRM] key controls to set the bearing and range
of the starboard, and press [ENT] key.
A ZONE filter will be set.
AIS targets in the area formed by the two set bearings and ranges are displayed by priority.
5─62
Attention
l When the guard zone function is enabled, the system
automatically corrects the filter range to cover the
guard zone.
Thus, the guard zone is always inside
the filter range.
Setting the AIS filter display function to ON/OFF (Filter Display)
Procedures
The setting of AIS Filter display will be
switched ON or OFF.
AIS Filter Setting
1. Filter Type
RANGE
2. Make AIS Filter
ON:
OFF:
3. Filter Display
Press [3] key while the ATA Filter
Setting menu is open.
Displays the AIS filter.
Hides the AIS filter.
ON
0. EXIT
5─63
5.4 AIS OPERATION
5.4.9


Deciding AIS Target and ARPA Target as the Same One
(Identical Distance)
Setting a range in which an AIS target and ARPA target are regarded as the same
one
An AIS target and an ARPA target in the set range are regarded as the same one, and the ARPA symbol is not
displayed. At this time, the AIS symbol is automatically activated.
Attention
l To display the hidden ARPA symbol, set the AIS
symbol display function to OFF.
(For the setting
procedure, refer to Section 5.4.5)
l Set 0 not to regard an AIS target and ARPA target as
the same one.
Procedures
Press [ATA MENU] key.
Press [2] key.
The AIS Setting menu will appear.
Press [7] key.
The ten-key will appear.
Select the distance to be set pressing
the numeric key, and press [ENT] key.
The range in which an AIS target and ARPA
target are regarded as the same one will be set.
AIS Setting
1. AIS Function
OFF
2. AIS Symbol Display
OFF
3. ATA Symbol Display
ON
4. CPA Limit
1 nm
5. TCPA Limit
1 min
6. AIS Filter Setting
7. Identical Distance
0. EXIT
5─64
CAUTION
When setting large values in determining the
distance to the same target, the ARPA target near
the AIS target may be not displayed.
For example, when a pilot ship with AIS function,
which is a small target, not ARPA target,
approaches to a cargo ship without ARPA
function, which is an ARPA target, the cargo ship’s
ARPA symbol may not be displayed.
5─65
5.4 AIS OPERATION
5.4.10


Conditions for Deciding AIS Target to be Lost
About a lost target
When the data of an AIS target cannot be received for a specified time, the target is decided to be lost and the
target data is deleted. As shown in the table below, the time until target data is deleted varies depending on the
class of receive data and the target status.
[SOLAS ship] (Class A)
Target Status
Time until data deletion
Vessel below 3 knots and it is now at anchor or on the berth
18 min
Vessel of 3 knots or more and it is now at anchor or on the berth
60 sec
Vessel of 0 to 14 knots
60 sec
Vessel of 0 to 14 knots and it is now changing the course
60 sec
Vessel of 14 to 23 knots
36 sec
Vessel of 14 to 23 knots and it is now changing the course
36 sec
Vessel of 23 knots or more
12 sec
Vessel of 23 knots or more and it is now changing the course
12 sec
[Non-SOLAS ship] (Class B)
Target Status
Time until data deletion
Vessel below 2 knots
18 min
Vessel of 2 to 14 knots
180 sec
Vessel of 14 to 23 knots
90 sec
Vessel of 23 knots or more
30 sec
Reference:
· When a dangerous target ship is lost, a lost alarm is issued and the symbol changes to a lost symbol. The
system calculates the current position from the last-received data and continues displaying the symbol for a
maximum of one minute. If the system cannot receive any data within one minute or the ALARM ACK
switch is pressed, the symbol is cleared.
· When a safe target ship is lost, the system does not issue a lost alarm, display a lost symbol, or calculate the
current position.
5─66
5.4.11
Displaying AIS Symbols
Maximum number of targets and the display priority
Attention
l When the system receives the data of the 51-th target
ship, it displays AIS MAX TARGET at the right lower
of the radar display, and issues audible alarm (beep
sound of pipi).
A radar of the JMA-5300 series displays AIS symbols for a maximum of 50 targets.
more exist, they are displayed according to the following priority:
When 51 AIS targets or
1. Target for which numeric data is displayed
2. Target displayed by the AIS target search function
3. arget in the AIS filter
(Targets closer to the own ship in the filter have higher priority.)
4. Target whose CPA/TCPA is the set value or less.
(Target for which a dangerous ship alarm has been issued)
5. Targets other than the above, which are outside the AIS filter
(Targets closer to the own ship in the filter have higher priority.)
Displaying the vectors of AIS symbols
Attention
l If a vector is not displayed even when the AIS symbol
is activated, probable causes are as follows:
1.
COG/SOG from the GPS has not been entered.
2.
The selected speed sensor is malfunctioning.
The vector of an AIS symbol is to be displayed as a vector over water or over ground, depending on the speed
sensor setting and current offset setting. The type of the currently displayed vector is confirmed in the own
ship’s information display area at the upper right of the radar display.
When “GND” is displayed to the right of OS STAB: Vector over ground
When “SEA” is displayed to the right of OS STAB: Vector over water
When the vector of an AIS symbol is displayed as a vector over water, the system has converted the AIS
symbol’s vector over ground to the vector over water according to the data received from the AIS and the own
ship’s information.
5─67
5.4 AIS OPERATION
5.4.12


AIS Alarm Display
Alarm messages for the AIS system:
Error Message
COA/TCPA
LOST
AIS MAX TARGET
AIS (DATA)
Description
There is a dangerous target.
There is a lost target.
The system received data (of the 51-th ship) over the specified maximum
number of AIS symbols.
The AIS is not connected correctly, or the power is off.
AIS I/F (DATA)
The AIS interface is not connected to the radar correctly, or it is faulty.
AIS ALARM ***
Alarm information issued with the ALR sentence by the AIS
*** is a 3-digit number which is Local Alarm No in the ALR sentence.
For AIS alarms, refer to the table below.
Numbers and definitions of AIS alarms which might appear on the radar display
Alarm No.
Definition
001
Transmission alarm
002
VSWR calculation result alarm
003
Receive channel 1 alarm
004
Receive channel 2 alarm
005
Receive channel 70 alarm
006
General error
008
Connection alarm between the transponder and controller
025
External EPFS connection alarm
026
The internal GPS is disabled, and latitude/longitude data has not been received from the external
sensor or the data is invalid.
029
The internal GPS is disabled, and SOG data has not been received from the external sensor or the
data is invalid
030
The internal GPS is disabled, and the COG command below has not been received from the
external sensor or the data is invalid.
032
Course data has not been received from the external sensor, or the data is invalid.
035
ROT data has not been received from the external sensor, or the data is invalid.
Reference: An error message is displayed at the lower right of the radar display.
Error message display area
5─68
5.4.13
Restrictions
The following restrictions are placed on use of the AIS function:
The AIS function is unavailable in the following cases:
· “MANUAL” is selected for the speed sensor.
· SET or DRIFT is set while LOG or 2AXW is selected for the speed sensor.
LOG or 2AXW cannot be selected for the speed sensor in the following case:
· SET or DRIFT is set while the AIS function is on.
MANUAL cannot be selected for the speed sensor in the following case:
· The AIS function is on.
Current offset (SET/DRIFT) cannot be turned on in the following case:
· LOG or 2AXW is selected for the speed sensor while the AIS function is on.
5─69
SECTION 6
TRUE AND FALSE ECHOES
ON DISPLAY
6.1
6.2
6.3
6.4
6.5
Radar Wave with the Horizon....................6-2
Strength of Reflection from the Targets ..6-4
Sea Clutters ................................................6-5
False Echoes ..............................................6-6
Display of Radar Transponder (SART).....6-9
The radar operator has a role of interpreting the radar displays to provide his best aid in maneuvering the ship.
For this purpose, the operator has to observe the radar displays after fully understanding the advantages and
disadvantages that the radar has. For better interpretation of radar display, it is important to gain more
experiences by operating the radar equipment in fair weathers and comparing the target ships watched with the
naked eyes and their echoes on the radar display.
The radar is mainly used to monitor the courses of own ship and other ships in open seas, to check buoys and
other nautical marks when entering a port, to measure own ship’s position in the coastal waters relative to the
bearings and ranges of the shore or islands using a chart, and to monitor the position and movement of a heavy
rain if it appears on the radar display.
Various types of radar display will be explained below.
6─1
6.1
RADAR WAVE WITH THE HORIZON
Radar beam radiation has the nature of propagating nearly along the curved surface of the earth.
The propagation varies with the property of the air layer through which the radar beam propagates.
In the normal propagation, the distance (D) of the radar wave to the horizon is approximately 10% longer than
the distance to the optical horizon. The distance (D) is given by the following formula:
D=2.23( h1 + h2 )(nm)
h1: Height (m) of radar scanner above sea level
h2: Height (m) of a target above sea level
Figure 6.1 is a diagram for determining the maximum detection range of a target that is limited by the curve of
the earth surface in the normal propagation.
Earth
Radar
Targets
6─2
D (nm)
Height of Radar Scanner
Detective Range
Height of Target
Figure 6.1
When the height of own ship’s scanner is 10 m for instance,
(a) A target that can be detected at the radar range of 64 nm on the radar display is required to have a height
of 660 m or more.
(b) If the height of a target is 10 m, the radar range has to be approx. 15 nm. However, the maximum
radar range at which a target can be detected on the radar display depends upon the size of the target
and the weather conditions, that is, the radar range may increase or decrease depending upon those
conditions.
6─3
6.2
STRENGTH OF REFLECTION FROM THE
TARGET
The signal intensity reflected from a target depends not only on the height and size of the target but also on its
material and shape. The echo intensity from a higher and larger target is not always higher in general.
In particular, the echo from a coast line is affected by the geographic conditions of the coast.
If the coast has a very gentle slop, the echo from a mountain of the inland appears on the radar display.
Therefore, the distance to the coast line should be measured carefully.
Mountain displayed on the radar display
Sea shore line not displayed
on the radar display.
Figure 6.2
6─4
6.3
SEA CLUTTERS
When the sea surface ruffles, bright echo returns spread around the center of the radar display.
The higher the waves are, the echo returns are larger.
Swirling currents may appear as a smooth line like a coastal line.
6─5
6.4
FALSE ECHOES
The radar observer may be embarrassed with some echoes that do not exist actually.
appear by the following causes that are well known:
[I]
These false echoes
Shadow
When the radar scanner is installed near a funnel or mast, the echo of a target that exists in the direction of
the funnel or mast cannot appear on the radar display because the radar beam is reflected on the funnel or
mast. Whether there are some false echoes due to shadows can be checked monitoring the sea clutter
returns, in which there may be a part of weak or no returns.
Such shadows appear always in the same directions, which the operator should have in mind in radar
operation.
[II] Side Lobe Effect
A broken-line circular arc may appear at the same range as the main lobe of the radar beam on the radar
display. This type of false echo can easily be discriminated when a target echo appears isolated. (See
Figure 6.3)
Figure 6.3
[III] False Echo by Secondary Reflection
When a target exists near own ship, two echoes from the single target may appear on the radar display.
One of those echoes is the direct echo return from the target and the other is the secondary reflection return
from a mast or funnel that stands in the same direction as shown in Figure 6.4.
Actual target
Direct microwave
Radar scanner
Funnel
Secondary reflection
of microwave
Figure 6.4
6─6
False echo from funnel
[IV] False Echo by Multiple Reflection
When there is a large structure or ship with a high vertical surface near own ship as shown in Figure 6.5,
multiple refection returns may appear on the radar display. These echoes appear in the same intervals, of
which the nearest echo is the true echo of the target.
Figure 6.5
[V] Abnormal Propagation
The maximum radar detection range depends upon the height of the scanner and the height of a target as
described in the section of “The Horizon for Radar Beam Radiation”. If a so-called “duct” occurs on the
sea surface due to a certain weather condition, however, the radar beam may propagate to a abnormally
long distance, at which a target may be detected by the radar.
For instance, assuming that the radar range is 6 NM (on the repetition frequency of 1100 Hz), the first
pulse is reflected from a target at about 76 NM or more and received during the next pulse repetition time.
In this case, a false echo appears at a position that is about 76 NM shorter than the actual distance.
If the false echo appears at 5 NM on the radar display, the true distance of the target is 5+76=81 NM. On
the radar range scale of 1.5 NM (on the repetition frequency of 1900 Hz), a false echo may appear at a
position that is about 43 NM shorter than the actual distance.
This type of false echo can be discriminated by changing over the range scale (the repetition frequency),
because the distance of the target changes accordingly.
6─7


6.4 FALSE ECHOES 
[VI] Radar Interference
When another radar equipment using the same frequency band as that on own ship is near own ship, a
radar interference pattern may appear on the radar display. This interference pattern consists of a number
of spots which appear in various forms. In many cases, these spots do not always appear at the same
places, so that they can be discriminated from the target echoes. (See Figure 6.6)
Figure 6.6
If radar equipment causing an interference pattern and this radar are of the same model, their transmitting
repetition frequency is nearly the same. As a result, interference patterns may be displayed
concentrically.
In this case, the interference patterns cannot be eliminated by using only the interference reflector function,
so press [TX/PRF] several times to fine-tune the transmitting repetition frequency.
An interference suppressing effect can be heightened by applying a different transmitting repetition
frequency to the interference pattern source radar and this radar.
6─8
6.5
DISPLAY OF RADAR TRANSPONDER
(SART)
The SART (Search and rescue Radar Transponder) is a survival device authorized by the GMDSS (Global
Maritime Distress and Safety System), which is used for locating survivors in case that a distress accident
occurs at sea. The SART is designed to operate in the 9 GHz frequency band.
When receiving the 9 GHz radar signal (interrogating signal) transmitted from the radar equipment on a rescue
ship or search aircraft, the SART transmit a series of response signals to inform the distress position to the
rescue and search party.
* This radar provides a shortcut item to make settings for SART signal reception.
automatically switches to the setting for SART reception.
Procedures
1 Press [RANGE +] or [RANGE -] to
set the radar range to 6 NM or 12
NM.
2 Press [RADAR MENU].
The Main Menu will appear.
3 Press [5].
Each time the key is pressed, switching between
ON and OFF takes place.
Execution of this item
MAIN MENU
1. IR
IR OFF
2. Process
PROC OFF
3. Target Enhance
OFF
4. Zoom
OFF
5. SART
ON
6. NAV Information
＞
8. Graphic Display
ON
9. RADAR MENU(→ Plot)
0. EXIT
6─9


6.4 FALSE ECHOES 
With the SART display mode set to ON, settings as shown below are made automatically.
(1) Sea clutter control:
Minimum (Most counterclockwise)
(2) AUTO SEA function:
OFF
(3) Rain and Snow Clutter Control (RAIN):
minimum
(4) Auto Rain and Snow Clutter function (AUTO RAIN):
OFF
(5) TUNE control:
No tuning (to weaken clutter echoes)
(6) Interference rejector (IR):
OFF
(7) PROCESS:
OFF
SART code
Position of SART
Position of the rescue craft
Land
Other ships
[Example of Display]
Attention
l When the SART function is set to ON to detect the SART signal, small
targets around own ship will disappear from the radar display. So it is
necessary to exercise full surveillance over the conditions around own
ship by visual watch in order to avoid any collision or stranding.
If two or more sets of radar equipment are installed on own ship, use
one set of 9 GHz band radar for detection of the SART signal and
operate others as normal radars for avoiding collision, monitoring
targets around own ship, and checking on own ship’s position and
avoidance of stranding.
After end of detecting the START signal, turn the START display off.
Then the radar returns normally to the nautical mode.
6─10
SECTION 7
MAINTEMANCE
7.1
7.2
Routine Maintenance .................................... 7-1
Maintenance on Each Unit ........................... 7-2
Scanner Unit NKE-2102/2252/1075A............ 7-2
Display Unit NCD-4510 ................................. 7-8
7.1
ROUTINE MAINTENANCE
WARNING
Never carry out internal inspection or repair work
of the equipment by users.
Inspection or repair work by unauthorized
personnel may result in fire hazard or electric
shock.
Ask the nearest branch, business office or a dealer
for inspection and repair.
Turn off the main power before maintenance work.
Otherwise, an electric shock may result.
Turn off the main power before cleaning the
equipment.
Especially, make sure to turn off the
indicator if a rectifier is used.
Otherwise,
equipment failure, or death or serious injury due to
electric shock may result, because voltage is
outputted from the rectifier even when the radar is
not operating.
For operating the radar equipment in the good conditions, it is necessary to make the maintenance work as
described below. If maintenance is made properly, troubles will reduce. It is recommended to make regular
maintenance work.
Common points of maintenance for each unit are as follow:
Clean the equipment.
Remove the dust, dirt, and sea water rest on the equipment cabinet with a piece of dry cloth.
Especially, clean the air vents with a brush for good ventilation.
7─1
7.2
MAINTENANCE ON EACH UNIT
Scanner Unit NKE-2102/2252/1075A
WARNING
Turn off the main power source before starting
maintenance.
Otherwise, an electric shock or injury may be
caused.
Turn off the main power if you need to be near the
scanner unit for maintenance or inspection
purposes.
Direct exposure to electromagnetic
waves at close range in death or serious injury.
Set the safety switch for stopping the scanner unit
to the OFF position.
Otherwise, an accidental contact with the rotating
scanner unit may cause injury.
7─2
CAUTION
Do not put watches, clocks, or magnetic cards
close to the modulator unit since this unit holds
magnetrons having strong magnetic force.
Failure or data destruction of the above devices
may result.
After finishing the maintenance work, reset the safety switch to the ON position.
Precautions in Mounting the Cover
When the cover is removed for regular checkup and replacement of parts and refitted after such work, the
procedures of fastening bolts shall be taken with the following precautions:
(a) The proper fastening torque of the fitting bolts (M8) is 1176 to 1470 N•cm (120 to 150kgf•cm) (which
makes the inside water-tight and protects the packings against permanent compressive strain).
The packings start producing from the cover at a torque of approximately 1470N•cm (150kgf•cm).
Do not fasten the bolts with a torque exceeding the specified value. Otherwise, the screws may be
broken.
(b) Use an offset wrench of 11 mm ´ 13 mm or a double-ended wrench of 13 mm ´ 17 mm (not longer than
200 mm).
(c) Screw all the bolts by hand first to prevent them playing, then fasten them evenly in order not to cause
one-sided fastening. (Fasten the bolts with 25% of the required torque at the first step.)
*: Fasten the bolts in the diagonal order.
7─3

7.2 Maintenance on each Unit 
④
③
②
①
Top View of NKE-2102
Bolt Tightening Procedure of NKE-2102 Cover
①
③
④
②
Side View of NKE-2252
Bolt Tightening Procedure of NKE-2252 Cover
7─4
⑤
①
③
⑧
⑦
④
②
⑥
Side View of NKE-1075A
Bolt Tightening Procedure of NKE-1075A Cover
7─5

7.2 Maintenance on each Unit 
(1) Radiator
Attention
l If the radiator front face (radiation plane) is soiled
with smoke, salt, dust, paint or birds’ droppings,
wipe it with a piece of soft cloth wetted with alcohol
or water and try to keep it clean at all times.
Otherwise, radar beam radiation may attenuate or
reflect on it, resulting in deterioration of radar
performance.
l Never use solvents of gasoline, benzine,
trichloroethylene and ketone for cleaning.
Otherwise, the radiation plane may deteriorate.
Check up and clean the radiator.
7─6
(2) Rotating section
(a) Supply Oil Seal
When there is not a grease nipple, the replenishment of grease oil is unnecessary.
Remove the cap on the grease nipple located on the side of the X band radar or on the front of S
band radar at which the radiator is supported, and grease with a grease gun.
Make the oiling every six months. The oil quantity shall be approximately 100 g, which is as much
as the grease comes out of the oil seal. Use the grease of Mobilux 2 of Mobil Oil.
(b) Oiling gears
Apply grease evenly to the tooth surfaces of the main shaft drive gear and the encoder drive gear
with a spreader or brush. Oiling in short intervals is more effective to prevent the gears from wear
and tear and extend their service life, but oil at least every six months.
Use Mobilux2 of Mobile Oil.
(c) Mounting legs
Check the mounting legs and mounting bolts of the scanner unit case for corrosion at intervals and
maintain them to prevent danger. Apply paint to them once a half year because painting is the best
measure against corrosion.
7─7

7.2 Maintenance on each Unit 
Display Unit NCD-4510 ･････････････････････････････････････････････････････
WARNING
When cleaning the screen, do not wipe it too
strongly with a dry cloth.
Also, do not use
gasoline or thinner to clean the screen. Otherwise
the screen surface may be damaged.
Dust accumulated on the screen will reduce clarity and darken the video. For cleaning it, wipe it with a piece
of soft cloth (flannel or cotton). Do not wipe it strongly with a piece of dry cloth nor use gasoline or thinner.
7─8
SECTION 8
TROUBLE SHOOTING
AND ADJUSTMENT
8.1
8.2
8.3
8.4
8.5
8.6
Performance Check.......................... 8-1
Fault Finding................................... 8-21
Trouble Shooting ............................ 8-22
Replacement of Major Parts .......... 8-27
Adjustments.................................... 8-30
Setting ............................................. 8-62
8.1
PERFORMANCE CHECK
Make operational check on the radar equipment regularly and if any problem is found, investigate it
immediately. Pay special attention to the high voltage sections in checking and take full care that no trouble is
caused by any error or carelessness in measurement. Take note of the results of checking, which can be used
effectively in the next check work.
Operational check shall be made in accordance with Table 8-1 Function Check List in the order as specified in
it.
Table 8-1
Equipment
Transmitter-receiver
Unit
Display Unit
Check List
Item to be checked
Criteria
Tuning LED of Receiver
The LED is lighting during
operation
Video and echoes on the screen
Sensitivity
LCD brilliance can be controlled
correctly
Various markers
Various numerical indications
Lighting
Can be correctly controlled
Safety Switch
Various Currents and Voltages
See 8-5.
Communications Lines
See 8-6.
Memory
See 8-4.
Panel
See 8-8, -9, -10, -11.
Monitor
See 8-7.
ARPA
See 8-42.
Magnetron current
See 8-18.
Performance Monitor
See 8-12.
Error Logging Display
See 8-13.
System Information Display
See 8-17.
8─1
Remarks
48NM range
8.1 Performance Check 

Check Performance on Test Menu
The performance status of this radar equipment can be checked on the TEST Menu.
Self Test
Monitor Test
Keyboard Test
PM Display
Error Logging
System INFO
MAGI
Procedures
[I]
Self-diagnostic function
[II] Monitor check
[III] Operation panel check
[IV] Performance monitor
[V] Error log display
[VI] System information display
[VII] Indication of magnetron current
* Execution of PM Display requires a PM unit.
Press [RADAR MENU] key twice.
Test Menu
Press [8] key.
1. Self Test
Press [9] key.
2. Monitor Test
The TEST Menu will appear.
3. Keyboard Test
* Button 57 on the radar display on page 2-7 is also available.
Select the check item you want to
check, pressing the numeric keys [1]
to [6] on Test Menu.
The list of check items will appear.
Exit
Press [RADAR MENU] key.
4. PM Display
ON
5. Error Logging
6. System INFO
MAGI
The TEST Menu will be closed.
0. EXIT
8─2
[I]
Self-diagnosis function
Check of Memory, Scanner Unit, and Communications Lines
Memory Test
Sensor Test
Line Test
Procedures
1) Memory check
2) Antenna check
3) Communication line check
Press [1] key while the Test Menu is
open.
The SELF TEST Menu will appear.
Select the item you want to check,
pressing numeric keys [1] to [3] .
The SELF CHECK Menu will appear.
Exit
Self Test
1. Memory Test
2. Sensor Test
3. Line Test
Press [RADAR MENU] key.
The Self Test Menu will be closed.
0. EXIT
8─3
8.1 Performance Check 

1) Memory Test
Checks for the performance of built-in memory.
SDRAM
SRAM
FLASH ROM
GRAPHIC
Procedures
SDRAM check
SRAM check
Flash ROM check
Graphic check
Press [1] key while the Self Test
menu is open.
Memory Test
1. SDRAM
OK
The Memory Test Menu will appear.
Select the item you want to check,
pressing numeric keys [1] to [4].
When no abnormality is found, OK is
displayed.
When an abnormality is found, NG is
displayed.
Exit
2. SRAM
OK
3. FLASH ROM
OK
4. GRAPHIC
OK
Press [RADAR MENU] key.
The menu will be closed.
0. EXIT
8─4
2) Sensor Test
Checks for signals from the antenna.
Safety Switch
AZI Pulse
HL Pulse
MH Current
Trigger
Video
Procedures
Antenna’s safety switch check
Antenna rotation signal check
Heading line signal check
Check on the load current of high voltage in the modulator
Radar trigger signal check
Radar video check
Press [2] key while the Self Test menu
is open.
The Sensor Test menu will appear.
When no abnormality is found, OK is
displayed.
When an abnormality is found, NG is
displayed.
In standby, ** will appear.
Exit
Press [RADAR MENU] key.
The menu will be closed.
Sensor Test
※ Safety Switch
OK
※ AZI Pulse
OK
※ HL Pulse
OK
※ MH Current
OK
※ Trigger
OK
※ Video
OK
0. EXIT
8─5
8.1 Performance Check 

3) Check of Communication Lines
Check the status of communications with options.
MTR
SIG.PROC
ATA
NSK
GPS Compass
ISW
COM1
COM2
COM3
COM4
Procedures
Check on connection with the transmitter-receiver
Check on connection with the signal processing circuit
Check on connection with the ARPA processing circuit
Check on connection with the NSK unit
Check on connection with the GPS compass
Check on connection with the interswitch
Check on connection with COM1
Check on connection with COM2
Check on connection with COM3
Check on connection with COM4
Press [3] key with the Self Test menu
open.
The Line Test menu will appear.
When no abnormality is found, OK is
displayed.
When an abnormality is found, NG is
displayed.
Line Test
※ MTR
OK
※ SIG.PROC
OK
※ ATA
OK
※ NSK
OK
※ GPS Compass
OK
※ ISW
OK
※ COM1
OK
※ COM2
OK
※ COM3
OK
※ COM4
OK
The status display field of equipment not
connected is left blank.
Exit
Press [RADAR MENU] key.
The menu will be closed.
0. EXIT
8─6
[II]
Monitor Test
Checks for the monitor.
Procedures
Press [2] key while the Test Menu is
open.
Monitor Test
1. Pattern 1
The Monitor Test Menu will appear.
Select the item number you want to
display, pressing numeric keys [1] to
[5] of the test pattern.
The selected test pattern will be displayed.
Pattern 1: All colors are filled with white.
Pattern 2: A white box is displayed on the black background of
1280 ´ 1024 dots.
Pattern 3: Displays rectangle ´ 2, circle ´ 2, and cross-shape´
13 (white lines on the black background).
Pattern 4: Displays “H” of 9 dots ´ 9 dots on the entire screen
(white character on the black background).
Pattern 5: Gray scale display (16 levels)
Pattern 6: Displays a color bar.
2. Pattern 2
3. Pattern 3
4. Pattern 4
5. Pattern 5
To return to the original display, press
any key.
If errors occur in the monitor, no test pattern
will appear.
0. EXIT
Exit
Press [RADAR MENU] key.
The menu will be closed.
8─7
8.1 Performance Check 

[III] Operation Panel Test
Checks for the controls and switches of the operation panel.
Key Test
Buzzer Test
Light
Procedures
1) Key check
2) Buzzer check
3) Keyboard light check
Press [3] key while the Test Menu is
open.
The Keyboard Test Menu will appear.
Select the item number you want to
check, pressing numeric keys [1] to [3]
of the item.
Keyboard Test
1. Key Test
2. Buzzer Test
3. Light
The check contents will be displayed.
Exit
Press [RADAR MENU] key.
The menu will be closed.
0. EXIT
8─8
1) Key Check
Checks for the controls and switches of the operation panel.
Procedures
Press [1] key while the Keyboard Test
menu is open.
The operation panel image will appear at the
upper left of the display.
Each key on the operation panel on the display is
shown in reverse video at the same time the key
is pressed, and the name of the pressed key is
displayed.
Exit
To return to the normal display, move
the cursor onto “EXIT” on the left side
of the display, and press [ENT] key.
Press [0] key.
Keyboard Test
1. Key Test
2. Buzzer Test
3. Light
The menu will be closed.
0. EXIT
8─9
8.1 Performance Check 

2) Buzzer Test
Checks for the operation panel buzzer.
Procedures
Press [2] key while the Keyboard Test
menu is open.
1. Key Test
The buzzer will sound.
Keyboard Test
The buzzer will sound for a given
length of time.
2. Buzzer Test
3. Light
Exit
Press [RADAR MENU] key.
The menu will be closed.
0. EXIT
8─10
3) Light
Checks for the operation panel light.
Procedures
Press [3] key while the Keyboard Test
menu is open.
The brightness of the operation panel is
gradually intensified at four levels.
Exit
Press [RADAR MENU] key.
Keyboard Test
1. Key Test
2. Buzzer Test
3. Light
The menu will be closed.
0. EXIT
8─11
8.1 Performance Check 

[IV] PM Display
Displays the bar indicating the performance monitor status.
* Execution of this item needs a PM unit.
Procedures
Press [4] key while the Test Menu is
open, and set PM Display to ON.
The PM bar will appear under the MAGI bar.
The setting of PM Display is switched back and
forth between ON and OFF each time [4] is
pressed.
Test Menu
1. Self Test
2. Monitor Test
3. Keyboard Test
4. PM Display
Exit
Press [RADAR MENU] key.
ON
5. Error Logging
The menu will be closed.
6. System INFO
MAGI
PM
0. EXIT
8─12
[V] Error Logging
When a system error occurs, this function shows the error communication line in reverse video. Errors that have
been reset are also displayed in time series.
Procedures
Press [5] key while the Test Menu is
open.
Error Logging
The Error Logging Menu will appear.
Error logs will be displayed in the
dotted area in the figure at right.
For the display contents, refer to Table 8-2.
Press [1] key to clear all the error logs.
Exit
Press [RADAR MENU] key.
The menu will be closed.
1. All Clear
0. EXIT
8─13
8.1 Performance Check 

Table 8-2
TRX(SSW OFF)
TRX(AZI)
TRX(HL)
TRX(MHV)
TRX
TRX(DATA)
TRX(HEATER)
TRX(REVERSE)
TRX(VIDEO)
TRX(TRIGGER)
TRX(FAN 1)
TRX(FAN 2)
TRX(STAB0)
TRX(STAB1)
TRX(STAB2)
TRX(STAB3)
TRX(STAB4)
TRX(STAB5)
TRX(STAB6)
TRX(STAB7)
TRX(STAB8)
TRX(STAB9)
TRX(STAB10)
TRX(STAB11)
TRX(STAB12)
TRX(STAB13)
TRX(STAB14)
TRX(STAB15)
TRX(HEATER SUB)
TRX(MHV SUB)
TRX(MOTOR)
PANEL
PANEL(DATA)
PANEL2
PANEL2(DATA)
NSK
NSK(GYRO)
NSK(DATA)
LOG
ISW
ISW(DATA)
List of System Error Message (1)
Scanner: Safety switch OFF
Scanner: BP error
Scanner: HL error
Scanner: Modulator’s high voltage alarm
Scanner: No communication
Scanner: Communication software version mismatched, checksum error, or collision
Scanner: Magnetron heater voltage alarm
Scanner: Reverse rotation
Scanner: VIDEO error
Scanner: TRIGGER error
Scanner: FAN 1 alarm
Scanner: FAN 2 alarm
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Stabilizer error
Scanner: Magnetron heater voltage alarm (non-selected side of 2 frequencies)
Scanner: Modulator’s high voltage alarm (non-selected side of 2 frequencies)
Scanner: Motor current alarm
Operation PANEL: Communication error
Operation PANEL: Checksum error
Operation PANEL2: Communication error
Operation PANEL2: Checksum error
NSK: No communication
NSK: GYRO error (error bit detected)
NSK: Checksum error (when receiving data from LOCAL CPU)
NSK: Logging error (error bit detected)
ISW: No communication
ISW: Data inconsistency, or checksum error
8─14
Table 8-3
DLOG
DLOG(DATA)
GPS
GPS(DATA)
GPS(STATUS)
PROC(BOOT)
PROC(INT)
PROC(AZI)
PROC(HL)
ATA(BOOT)
ASIC(INT)
ASIC1 to RADAR
RADAR to ASIC2
ASIC1 to ARPA
ARPA to ASIC2
ASIC to LOCAL CPU
PROC(VIDEO)
PROC(TRIGGER)
AIS
AIS(DATA)
AIS I/F
AIS I/F(DATA)
AIS ALARM ***
COM1
COM2
COM3
List of System Error Message (2)
2-axis log: No communication
2-axis log: Data error
GPS: No communication
GPS: Data error
GPS: Status error
Signal processing unit: Boot error
Signal processing unit: Interrupt error
Signal processing unit: BP error
Signal processing unit: HL error
ARPA: Boot error
Error during interrupt to ASIC1
Error during interrupt from ASIC1 to RADAR DSP
Error during interrupt from RADAR DSP to ASIC2
Error during interrupt from ASIC1 to ARPA DSP
Error during interrupt from ARPA DSP to ASIC2
Error during interrupt from ASIC1 to LOCAL CPU
VIDEO error
Trigger error
AIS: No communication
AIS: Communication error
AIS I/F: No communication
AIS I/F: Communication error
AIS alarm (Up to 10 alarm messages can be displayed.)
COM1 port alarm
COM2 port alarm
COM3 port alarm
8─15
8.1 Performance Check 

Table 8-4
COM4
HEADING
HEADING(DATA)
DEPTH
DEPTH(DATA)
TEMP
TEMP(DATA)
WIND
WIND(DATA)
CURRENT
CURRENT(DATA)
List of System Error Message (3)
COM4 port alarm
Heading data: No communication
Heading data: Data error
Water depth: No communication
Water depth: Data error
Water temperature: No communication
Water temperature: Data error
Wind direction/velocity: No communication
Wind direction/velocity: Data error
Tidal current: No communication
Tidal current: Data error
Reference: An error message and a warning will appear at the lower right of the radar display.
Position of message or warning indication
8─16
[VI] System INFO
Displays the current system information.
Indicator
MTR
System No.
TX Time
Total Time
Procedures
Processor software version information
Scanner software version information
System number
Total transmitting time (Total time during which radar was transmitted)
Total operating time (Total power-on time)
Press [6] key while the Test Menu is
open.
The System INFO Menu will appear.
System INFO
※ Indicator
Ver.xx.xx
Exit
Press [RADAR MENU] key.
※ MTR
The menu will be closed.
Ver.xx.xx
※ System No.
No. xxxxx
※TX TIME
X-BAND
Xx hours
S-BAND
Xx hours
※ Total Time
Xx hours
EXIT
8─17
8.1 Performance Check 

[VII] MAGI
Displays the MAGI bar indicating the magnetron current to check.
Procedures
Check if the MAGI bar in the Test Menu
reads the value below in a range of 24
NM.
1. Self Test
10 kW: 4 to 5 scale marks
25 kW: 5 to 8 scale marks
2. Monitor Test
Test Menu
3. Keyboard Test
Exit
Press [RADAR MENU] key.
4. PM Display
ON
The menu will be closed.
5. Error Logging
6. System INFO
MAGI
0. EXIT
8─18
List of Alarms and other Indications
Table 8-5
List of Gyro Alarms
Message
Description
SET GYRO
Requires setting of true bearing.
TM RESET
Use care of resetting TM.
POSN RESET
Change the latitude and longitude sentence.
Table 8-6
List of ARPA Alarms
Message
Description
CPA/TCPA
Closest approach point/Time for reaching the closest approach point (ARPA)
GZ
A target exists in a guard zone.
LOST
A target under acquisition cannot be tracked.
Table 8-7
List of Operational Error Messages and Warnings
Message
Description
NO HEADING DATA
ARPA operation or TM selection when bearing data is invalid
NO POSITION DATA
Mark or line input when the latitude and longitude is invalid.
OUT OF RANGE
ARPA out of acquisition range
CHANGE RANGE
TM selection due to TM-disabled range (96 or 120 nm)
Zooming in a ZOOM-disabled range (0.125 nm)
MAX POINT
Tried to enter navigation information beyond the specified.
CAN’T TRANSMIT
Tried to transmit within 1 second after standby or when the transmitterreceiver has any trouble.
INVALID DATA
Tried to enter any data beyond its range.
MAX TARGET
The maximum number of targets of ARPA is under acquisition.
SELECT STRAIGHT
The operator set PM to ON without selecting straight.
NO CARD
Card not detected yet
CARD FULL
Card capacity insufficient
FORMAT CARD
Unformatted card
INVALID CARD
Invalid card
READ FAILED
Read failure
WRITE FAILED
Write failure
DELETE FAILED
Deletion failure
FORMAT FAILED
Format failure
COPY FAILED
Copy failure
NOT ALLOWED
General operation error
8─19
8.1 Performance Check 

Table 8-8
List of Interswitch Alarms and Messages
Message
Description
MASTER RANGE CHG
The range of the own display unit has changed due to change in the range of the
master display unit.
ALREADY SLECTED
Selected the already selected pattern.
ISW END!
The switchover of the Interswitch ended normally.
ISW BUSY!
Access to the ISW menu was made during interswitching.
TRX ST-BY!
The scanner unit is in the standby mode.
ISW STRAIGHT
Failed in straight connection when the Interswitch system stops operating.
ISW STAND-BY!
The Interswitch recovered normally.
ISW TIME OUT
Failed in switching.
ISW ERROR!
The interswitch is disabled.
Message set off in a failure of the monitor fan
！
When a failure has occurred in the monitor fan, the monitor displays LCD FAN FAILURE at the center. This display
will disappear by pressing the BRIGHTNESS knob on the monitor. In order to replace the monitor fan, contact our
service department, or the distributor.
8─20
8.2
FAULT FINDING
In case of semiconductor circuits, it is deemed that there are few cases in which the used semiconductor devices
have inferior quality or performance deterioration except due to insufficient design or inspection or by other
external and artificial causes. In general, the relatively many causes are disconnection in a high-value resistor
due to moisture, a defective variable resistor and poor contact of a switch or relay.
Some troubles are caused by defective parts, imperfect adjustment (such as tuning adjustment) or insufficient
service (such as poor cable contact). It will also be effective to check and readjust these points.
Melted fuses are caused by any clear cause. When a fuse is replaced, it is necessary to check the related
circuits even if there is no trouble. In checking, note that there is some dispersion in the fusing characteristics.
Table 8-12 shows a list of fuses used in the equipment.
Table 8-12
Fuse List
Location
Parts No.
Current Rating
Transmitter-receiver Unit
F1
1A
Rectifier circuit PC1001
MF51NN-1A
Display Unit
F2 to F3
10A
I/O circuit PC410
MF60NR-10A
LOG.NSK circuit
F1 to F4
0.5A
LOG.NSK circuit PC4201
MF60NR-0.5A
8─21
Protection Circuit
Type
8.3
TROUBLE SHOOTING
As this radar equipment includes complicated circuits, it is necessary to request a specialist engineer for repair
or instructions for remedy if any circuit is defective.
There are also troubles by the following causes, which should be referred to in checking or repair work.
Poor Contact in Terminal Board of Inter-Unit Cables
a) Poor contact in terminal board
b) The cable end is not fully connected, that it, contacted with earthed another terminal.
c) Disconnected cable wire
Poor Contact of Connector within Unit
Reference: This radar equipment is provided with 8-13 standard spares.
Table 8-13
Spares (7ZXRD0014, JMA-5310-6, 7ZXRD0015, JMA-5320-7/9/6HS, JMA-5330-12)
7ZXRD0014
Name
Type/Code
Shape (mm)
Fuse
ST4-5AN1
(5ZFCA00050)
31.8
Fuse
ST6-8AN1
(5ZFCA00052)
31.8
Motor
brush
54583-01
(BRSW00101)
In use
Spare
Parts No.
Location
F2
Inside processing
unit
F3
Inside processing
unit
–
Scanner monitor
Φ6.35
Φ6.35
Φ8.0
32.0
8─22
7ZXRD0015
Name
Type/Code
Shape (mm)
Fuse
ST6-10AN1
(5ZFCA00053)
31.8
Fuse
ST6-10AN1
(5ZFCA00053)
31.8
In use
Spare
Parts No.
Location
F2
Inside processing
unit
F3
Inside processing
unit
Φ6.35
Φ6.35
Table 8-14
Special Parts
[I] JMA-5310-6
Parts No.
Name
Type
Manufacturer
Location
Code
V101
Magnetron
MSF1425B
NJRC
Scanner
5VMAA00051
A101
Circulator
FCX68
Toshiba
Scanner
6AJRD00001
A102
Diode Limiter
NJS6930
NJRC
Scanner
5EZAA00024
[II] JMA-5320-7/9/6HS
Parts No.
Name
Type
Manufacturer
Location
Code
V1
Magnetron
M1568B(J)
NJRC
Scanner
5VMAA00082
A101/A102
Circulator
FCX68
Toshiba
Scanner
6AJRD00001
A303
Diode Limiter
NJS6930
NJRC
Scanner
5EZAA00024
[III] JMA-5330-12
Parts No.
Name
Type
Manufacturer
Location
Code
V1
Magnetron
M1302
NJRC
Scanner
5VMAA00032
A101
Circulator
NJC3320
NJRC
Scanner
5AJBV00004
A303
TRHPL
TL378A
NJRC
Scanner
5VLAA00032
8─23
8.3 Trouble Shooting 

Table 8-15
Location
Circuit Block to be Repaired (JMA-5310-6)
Circuit Block
Type
Remarks
Scanner
Motor with gear
CBP-139
DC brush motor (ordinary)
Scanner
Modulator
CPA-248
Excluding Magnetron
Scanner
Receiver
NRG-226
Including CAE-475-1
Scanner
Power supply circuit
CBD-1645
Processor
Radar processing circuit
CDC-1198
PC440
Processor
DSP circuit (ARPA)
CDC-1186A
PCI (Option)
Processor
DSP circuit (MARPA)
CDC-1186B
PCI (Option)
Processor
NSK/LOG I/F circuit
CMJ-304C
PC4201 (Option)
Processor
Terminal board circuit
CQD-1937
PC430
Processor
I/O circuit
CQC-1075
PC410
Processor
Power circuit
CBD-1655
PC510
Operation panel unit
Operation panel unit
CCK-905
PC600
Operation panel unit
PS2 connector circuit
CQC-1095
PC610
Multi-function control
Operation circuit
CCK-914
PC601 (Option)
Multi-function control
PS2 connector circuit
CQC-1109
PC610 (Option)
Junction Box
Interface circuit
CMH-1994
PCI (Option)
Display
Monitor fan
109R0812H4D01
8─24
Table 8-16
Location
Circuit Block to be Repaired (JMA-5320-7/9/6HS)
Circuit Block
Type
Remarks
Scanner
Motor with gear
H-7BDR0044
DC brushless
speed)
motor
Scanner
Motor with gear
H-7BDRD0045
DC brushless motor (high speed)
Scanner
Modulator
NMA-499-1
Including CPA-209-1
Including CFR-161
Excluding Magnetron
Scanner
Receiver
NRG-154
Including CAE-344
Scanner
Power supply circuit
CBD-1682
Scanner
T/R control circuit
CMC-1205
Scanner
Motor power supply circuit
CBH-3
Scanner
Motor power supply circuit
CSA-283
Processor
Radar processing circuit
CDC-1198
PC440
Processor
DSP circuit (ARPA)
CDC-1186A
PCI (Option)
Processor
DSP circuit (MARPA)
CDC-1186B
PCI (Option)
Processor
NSK/LOG I/F circuit
CMJ-304C
PC4201 (Option)
Processor
Terminal board circuit
CQD-1937
PC430
Processor
I/O circuit
CQC-1075
PC410
Processor
Power circuit
CBD-1655
PC510
Operation panel unit
Operation panel unit
CCK-905
PC600
Operation panel unit
PS2 connector circuit
CQC-1095
PC610
Multi-function control
Operation circuit
CCK-914
PC601 (Option)
Multi-function control
PS2 connector circuit
CQC-1109
PC610 (Option)
Display
Monitor fan
109R0812H4D01
8─25
(ordinary
8.3 Trouble Shooting 

Table 8-17
Location
Circuit Block to be Repaired (JMA-5330-12)
Circuit Block
Type
Remarks
Scanner
Motor with gear
MPEM30030
220VAC 3-phase
Scanner
Motor with gear
MPEM30110
220VAC 3-phase
Scanner
Motor with gear
MPEM30092
110VAC 1-phase
NMA-534-1
Including CPA-209
Including CFR-161
Excluding Magnetron
Scanner
Modulator
Scanner
Receiver
NRG-222
Including CAE-344-4
Including CAF-424
Including CGH-205
Including CBD-1274
Scanner
T/R control circuit
CMC-1205
PC1101
Scanner
Power supply circuit
CHD-1682
Processor
Signal processing circuit
CDC-1198
PC440
Processor
DSP circuit (ARPA)
CDC-1186A
PCI (Option)
Processor
DSP circuit (MARPA)
CDC-1186B
PCI (Option)
Processor
NSK/LOG I/F circuit
CMJ-304C
PC4201 (Option)
Processor
Terminal board circuit
CQD-1937
PC430
Processor
I/O circuit
CQC-1075
PC410
Processor
Power circuit
CBD-1655
PC510
Operation panel unit
Operation panel unit
CCK-905
PC600
Operation panel unit
PS2 connector circuit
CQC-1095
PC610
Multi-function control
Operation circuit
CCK-914
PC601 (Option)
Multi-function control
PS2 connector circuit
CQC-1109
PC610 (Option)
Display
Monitor fan
109R0812H4D01
8─26
8.4
REPLACEMENT OF MAJOR PARTS
CAUTION
Turn off the main power source before replacing
parts.
Otherwise, an electric shock or trouble
may be caused.
Before replacing the magnetron, turn off the main
power source and wait for 5 minutes or more until
the high voltage circuits are discharged.
Otherwise, an electric shock may be caused.
Take off your wrist watch when bringing your
hands close to the magnetron.
Otherwise, your watch may be damaged because
the magnetron is a strong magnet.
Two or more persons shall replace the liquid
crystal monitor.
If only one person does this work, he may drop the
LCD, resulting in injury.
Even after the main power source is turned off,
some high voltages remain for a while.
Do not contact the inverter circuit in the LCD with
bare hands.
Otherwise, an electric shock may be
caused.
8─27
8.4 Replacement of Major Parts


Parts Required for Periodic Replacement
Here are parts required for periodic replacement
Part name
Interval
1. Magnetron
4000 hours
2. Motor
10000 hours
3. LCD backlight
50000 hours
4. Fan motor
20000 hours
5. Backup battery
3 years
Replacement of magnetron (V1/V201)
Remove the shield cover of the modulator and check that no charge remains in the high-voltage modulator
circuit. Then, remove the socket of the magnetron. The magnetron can be demounted by removing the
screws fixing it. When mounting a new magnetron, do not touch the magnet with a screwdriver or put it on an
iron plate. After replacement, connect the lead wire correctly.
Handling of Magnetron under Long-Time Storage
The magnetron that has been kept in storage for a long time may cause sparks and operate unstably when its
operation is started. Perform the aging in the following procedures:
(1) Warm up the cathode for a longer time than usually. (20 to 30 minutes in the STBY state.)
(2) Start the operation from the short pulse range and shift it gradually to the longer pulse ranges. If the
operation becomes unstable during this process, return it to the standby mode immediately. Keep the
state for 5 to 10 minutes until the operation is restarted.
Replacement of TRHPL (A303)(JMA-5330-12)
Remove the 4 screws fixing the TRHPL with receiver and remove the TRHPL. When mounting the TRHPL,
take care of the mounting direction and mount it in the arrow direction facing it the receiver front end.
Replacement of Diode Limiter (A303)(JMA-5310-6, JMA-5320-7/9/6HS)
Remove the 4 screws fixing the receiver. Remove the 4 screws fixing the diode and the limiter, and remove
diode limiter. When mounting the diode limiter, take care of the mounting direction and mount it in the arrow
direction facing it the receiver front end.
Connect the wiring in the same way as before the replacement.
8─28
Replacement of LCD Monitor
Attention
l When replacing the LCD monitor, which is easily
broken by a little impact, handle it carefully and do
not hit any article against it or put it on a hard article.
1 JMA-5310-6, JMA-5320-7/9/6HS, JMA-5330-12 (Display Unit: NCD-4510)
(1) Disconnect the cables from the connectors “VIDEO” and “VIDEO DC OUT” on the rear of the processor.
(2) Softly place the LCD monitor on a desk covered with a soft cloth.
(3) Attach a new LCD monitor in the reverse sequence as described above.
8─29
8.5
ADJUSTMENTS
This section describes the electrical adjustments of the equipment as the adjustment procedures to be carried
out by service persons at the time of installation.
CAUTION
Do not carry out the adjustments of the equipment
except authorized service persons.
If wrong
setting is carried out, this may cause unstable
operation.
Do not carry out the adjustments during
navigation.
Otherwise, the radar performance
may be affected, resulting in an accident or
trouble.
Tuning, bearing and range adjustments can be made from the operation panel.
the following procedures.
Code Input
Press “0” and “ENT”
to Adjust Menu
How to open the Adjust Menu
Procedures
Start the adjustment mode in
Continue to press [RADAR MENU]
key.
The Code Input Menu will appear.
Press [0] key.
Move the cursor onto the “ENT”
button in the Code Input menu, and
press [ENT] key.
The Adjust Menu will appear.
CLR
8─30
ENT
4
Press [1] key.
The Equipment Setup Menu will appear.
Equipment Setup
1. Bearing Adjustment
0.0°
Adjust Menu
1. Equipment Setup
2. Maintenance Menu
2. Range Adjustment
3. Tune Adjustment
4. TRX Setting
5. COM Port Setting
6. NAV Setting
7. Sector Blank
9. SP/ATA INIT Setup
0. EXIT
9. Language
ENGLISH
0. EXIT
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─31
8.5 Adjustments 

Tuning Adjustment
Procedures
Open the Equipment Setup Menu.
Press [3] key.
The Code Input Menu will appear.
Using numeric pad, enter the value and
then press “ENT” button, and press
“EXIT” button to determine the value.
Equipment Setup
1. Bearing Adjustment
0.0°
2. Range Adjustment
3. Tune Adjustment
The multi-function control can also be used to
enter the value.
Repeat Step 3, and adjust the
bar-graph of the tuning indicator on
the upper left of the display so that it
becomes the longest.
4. TRX Setting
5. COM Port Setting
6. NAV Setting
Exit
Press [RADAR MENU] key.
7. Sector Blank
The Main Menu will reappear.
9. Language
ENGLISH
0. EXIT
8─32
Bearing Adjustment
Adjust the bearing so that bearing of the target measured with the ship’s compass matches that of the target
echo on the radar display.
Procedures
Press AZI MODE to select the relative
bearing presentation [H UP] mode. Set
Image Processing to OFF.
[AZI MODE] ® Button 5 on the Radar Menu
Image Processing ® Button 12 in the Radar
Menu
Measure the bearing of an adequate
target (for example, a ship at anchor, a
breakwater or a buoy) relative to own
ship’s heading.
Equipment Setup
1. Bearing Adjustment
0.0°
2. Range Adjustment
3. Tune Adjustment
4. TRX Setting
Open the Equipment Setup Menu.
Press [1] key.
5. COM Port Setting
The Code Input Menu will appear.
6. NAV Setting
Using numeric key, enter the value and
then press “ENT” button, and press
“EXIT” button to determine the value.
7. Sector Blank
The multi-function control can also be used to
enter the value.
Repeat Step 5 above, and adjust to
display the target measured in Step 2
to the measured bearing.
9. Language
ENGLISH
0. EXIT
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─33
8.5 Adjustments 

Range Adjustment
Adjust the range so that the range of the target on the radar video is indicated correctly.
Procedures
Search the radar display for a target of
which range is already known.
Open the Equipment Setup Menu.
Equipment Setup
1. Bearing Adjustment
0.0°
Press [2] key.
2. Range Adjustment
The Code Input Menu will appear.
Using numeric pad, enter the value and
then press “ENT” button, and press
“EXIT” button to determine the value.
The multi-function control can also be used to
enter the value.
Exit
Repeat step 4, and adjust until the
target range measured in step 1 and
the range on the radar display become
identical.
3. Tune Adjustment
4. TRX Setting
5. COM Port Setting
6. NAV Setting
7. Sector Blank
Press [RADAR MENU] key.
The Main Menu will reappear.
9. Language
ENGLISH
0. EXIT
8─34
Antenna Height Adjustment
Set the antenna height above the sea level, but change this setting carelessly.
Procedures
Measure the height from the sea level to
the antenna in advance.
Open the Equipment Setup Menu.
Press [4] key.
TRX Setting
1. Antenna Height
5-10m
The TRX Setting Menu will appear.
Press [1] key.
The Antenna Height Set Value window will
appear.
4. PM Adjustment
Select the antenna height measured in
step 1 from the pull-down menu by
pressing the numeric key [1] to [4].
The antenna height will be determined.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
7. Output Pulse
2048
8. Antenna Location
0m
0. EXIT
8─35
0m
8.5 Adjustments 

Bearing Pulse Output Adjustment (Output Pulse)
Set the output value of bearing pulse. This radar can set the output value to 2048 pulses and 4096 pulses.
This setting is allowed only when a 25 kw antenna is used.
Procedures
Open the Equipment Setup Menu.
Press [4] key.
The TRX Setting Menu will appear.
Press [7] key.
Select a set value to be used.
TRX Setting
1. Antenna Height
5-10m
4. PM Adjustment
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
7. Output Pulse
2048
8. Antenna Location
0m 0 0m
0. EXIT
8─36
Scanner Antenna Location Adjustment (Antenna Location)
Set the position at which the scanner is installed.
Procedures
Open the Equipment Setup Menu.
Press [4] key.
The TRX Setting Menu will appear.
TRX Setting
1. Antenna Height
5-10m
Press [8] key.
The Antenna Location Menu will appear.
4. PM Adjustment
7. Output Pulse
2048
8. Antenna Location
0m
0. EXIT
8─37
0m
8.5 Adjustments 

Antenna Location
1. SET
a:
35m
b:
-5m
(-500 to 500 [m])
LT
RT
LB
RB
CLR
ENT
Set Location Roughly
0. EXIT
Enter two values, a and b.
With a > 0, the antenna is installed in the ship’s heading direction.
With a < 0, the antenna is installed in the ship’s stem direction.
With b > 0, the antenna is installed in the ship’s starboard side direction.
With b < 0, the antenna is to be installed in the ship’s port side direction.
Pressing T, LT, L, LB, B, RB, R, or RT in the own ship gives ±sign, appropriate to the
place, to values a and b.
Press CLR for cancellation.
Press ENT to determine the value.
Press [0] key.
Entry will end.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─38
COM Port Setting
External sensor signals are to be entered to this radar via a COM port. This radar has five COM ports. Input
of signals from sensors or output of signals to sensors needs to adjust the COM port in accordance with the
sensors.
[I]
Baud Rate Setting
Set the baud rate of the signal to be entered into the COM port.
Procedures
Open the Equipment Setup Menu.
Press [5] key.
The COM Port Setting Menu will appear.
Press [1] key.
The Baud Rate Setting Menu will appear.
Select the port number you want to set,
pressing the numeric keys [1] to [5].
The Baud Rate Selection menu will appear.
Baud Rate
1. COM1 (GPS)
4800bps
1. (PC)
1200bps
2. COM2
2. 4800bps4800bps
3. 38400bps
3. COM3 (NAV1)
384000bp
4. COM4 (NAV2)
4800bps
5. COM5 (COMPASS)
4800bps
In the selection menu, select the baud
rate you want to set, pressing the
numeric key.
Selection value
1. COM1 (GPS):
2. COM2 (PC):
1200/4800/*38400 bps
1200/4800/
38400/115200 bps
3. COM3 (NAV1):
1200/4800/38400 bps
4. COM4 (NAV2):
1200/4800/*38400 bps
5. COM5 (COMPASS): 4800/38400 bps
0. EXIT
* If COM1/COM4 is set to 38400 bps, signals
can only be transmitted. The baud rate for reception can be set to up to 4800 bps.
COM5 can be used for receive port only. It is dedicated for COMPASS signal. This
means that the port is unavailable for other signals.
The GPS, PC, NAV1, NAV2, COMPASS in the parentheses are the standard ports
connecting to the external sensors.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─39
8.5 Adjustments 

[II]
Reception Sentence Setting (RX Sentence)
Set signal sentences to be received from sensors.
Procedures
2. GPS (WPT/Time)
Press [5] key.
3. Depth
The COM Port Setting Menu will appear.
4. Wind
5. Current
Open the Equipment Setup Menu.
RX Sentence
1. GPS (LL/COG/SOG) >
Press [2] key.
The RX Sentence Menu will appear.
Select the signal you want to set,
pressing the numeric keys [1] to [3].
The Setting Menu for each signal will appear.
Settable signal
1. GPS (LL/COG/SOG)
2. GPS (WPT/Time)
3. Depth
4. Wind
5. Current
0. EXIT
¯
Select whether or not you want to use
sentence for the signal.
Types of sentences to be used
GPS (LL/COG/SOG): GGA/RMC/RMA/GNS/
GLL/VTG
GPS (WPT/Time):
GGA/RMC/RMB/
BWC/BWR/ZDA
Depth:
DPT/DBK/DBT/DBS
Wind:
MWV/MWD
Current:
CUR
After having selected a signal, choose the
number of the sentence for which you want to
set whether or not it is used, pressing the
numeric key.
As concerns current, set data set number and
layer number of CUR sentence.
Exit
GPS (LL/COG/SOG)
1. GGA
¯
USE
2. RMC
USE
3. RMA
USE
4. GNS
USE
5. GLL
USE
6. VTG
USE
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─40
[III]
Transmission Port Setting (TX Port)
Set the number of the port via which signals are transmitted to sensors.
Procedures
Open the Equipment Setup Menu.
Press [5] key.
The COM Port Setting Menu will appear.
Press [3] key.
The TX Port Menu will appear.
Select the signal you want to set,
pressing the numeric keys [1] to [8].
TX Port
1. TTM (ATA Target)
OFF
1. OFFTarget）
2. TLL（ATA
2. COM1 (GPS)
OFF
3. COM2 (PC)
3. OSD
4. COM3 (NAV1)
OFF
5. COM4 (NAV2)
4. RSD
OFF
The Output Port Setting Menu for each signal
will appear.
5. ALR
Settable signals
1. TTM (ATA Target)
2. TLL (ATA Target)
3. OSD
4. RSD
5. ALR
6. AIS
7. TTM (AIS Target)
8. TLL (AIS Target)
6. AIS
OFF
AUTO
7. TTM (AIS Target)
OFF
8. TTL (AIS Target)
OFF
Select which port you want to use for
output.
0. EXIT
Types of ports to be used
1. OFF
2. COM1 (GPS)
3. COM2 (PC)
4. COM3 (NAV1)
5. COM4 (NAV2)
Select the number of the port to be used, pressing the numeric key.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
* Note that, if you set COM1 and COM4 for transmission, they cannot be used as reception ports.
8─41
8.5 Adjustments 

[IV]
Reception Port Setting (RX Port)
Set the number of the port via which signals are received from sensors.
Procedures
Open the Equipment Setup Menu.
Press [5] key.
1. GPS
The COM Port Setting Menu will appear.
Press [4] key.
The RX Port Menu will appear.
Select the signal you want to set,
pressing the numeric keys [1] to [6].
5. Wind
Settable signals
1. GPS
2. DLOG
3. Depth
4. Temperature
5. Wind
6. Current
6. Current
AUTO
AUTO
Select which port you want to use for
output.
0. EXIT
* For AUTO, the initial value will be selected.
Select the number of the port to be used, pressing the numeric key.
AUTO
1.
AUTO
2. DLOG
2. COM1 (GPS)
AUTO
3. COM2 (PC)
3. Depth
4. COM3 (NAV1)
OFF
5. COM4 (NAV2)
4. Temperature
AUTO
The Reception Port Setting Menu for each
signal will appear.
Types of ports to be used
1. AUTO
2. COM1 (GPS)
3. COM2 (PC)
4. COM3 (NAV1)
5. COM4 (NAV2)
Exit
RX Port
Press [RADAR MENU] key.
The Main Menu will reappear.
8─42
Navigator Setting (NAV Setting)
JRC’s GPS adopts connector connections on the backside of the processing unit. However, a GPS produced
by other manufacturers uses terminal strip inputs in the processing unit. To do so, input area settings are
needed. In addition, GPS antenna installation position can be set.
[1]
Navigator Setting (Sel NAL Equipment)
Set whether the navigator to be connected is to be installed inside (JRC’s GPS) or outside (other
manufacturer’s GPS).
Procedures
Open the Equipment Setup Menu.
Press [6] key.
The NAV Setting Menu will appear.
Press [1] key.
NAV Setting
1. Sel NAV Equipment
INT GPS
2. GPS ANT. Location
0m
0m
Switching between inside and outside is done
each time the key is pressed.
INT GPS: JRC’s GPS (connection on the
backside of the processing unit)
EXT:
Other manufacturer’s GPS (Terminal
strip connection inside the processing
unit)
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─43
8.5 Adjustments 

[II]
GPS Antenna Location Setting (GPS ANT. Location)
Set the GPS antenna installation position.
Procedures
Open the Equipment Setup Menu.
Press [6] key.
The NAV Setting Menu will appear.
Press [2] key.
NAV Setting
1. Sel NAV Equipment
INT GPS
2. GPS ANT. Location
0m
0m
The GPS Antenna Location Menu will appear.
0. EXIT
8─44
Antenna Location
1. SET
a:
35m
b:
-5m
(-500 to 500 [m])
LT
RT
LB
RB
CLR
ENT
Set Location Roughly
0. EXIT
Enter two values, a and b.
With a > 0, GPS antenna is installed in the ship’s heading direction.
With a < 0, GPS antenna is installed in the ship’s stem direction.
With b > 0, GPS antenna is installed in the ship’s starboard side direction.
With b < 0, GPS antenna is to be installed in the ship’s port side direction.
Pressing T, LT, L, LB, B, RB, R, or RT in the own ship gives ±sign, appropriate to the
place, to values a and b.
Press CLR for cancellation.
Press ENT to determine the value.
Press [0] key.
Entry will end.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─45
8.5 Adjustments 

Sector Blank Function (Sector Blank)
Set a sector range, preventing displaying the radar echo only within the area.
created.
[I]
Three types of sector can be
Turning ON/OFF the Sector function (Sector 1, 2 and 3)
Procedures
Open the Equipment Setup Menu.
Press [7] key.
The Sector Blank Menu will appear.
Sector Blank
1. Sector 1
ON
2. Sector2
Select the number you want to excuted
sector blank, Pressing the numeric
keys [1] to [3].
3. Sector3
Switching between ON and OFF is done each
time the key is pressed.
ON: Execution of sector blank
OFF: Cancel
4. Make Sector 1
5. Make Sector 2
6. Make Sector 3
ON
ON
7. ENT
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
Note: This function can be performed only when the scanner
is connected to NKE-2252 and 1075A.
0. EXIT
8─46
[II]
Making Sector Function (Make Sector 1, 2, 3)
Procedures
Open the Equipment Setup Menu.
Press [7] key.
The Sector Blank Menu will appear.
Slect the number you want to make
sector blank, pressing the numeric
keys [4] to [6].
The sector blank for the numeric key pressed
will be made.
Set the start point of the sector blank
by operating the [EBL] dial, and then
press ENT.
Sector Blank
1. Sector 1
ON
2. Sector2
ON
3. Sector3
ON
4. Make Sector 1
5. Make Sector 2
6. Make Sector 3
7. ENT
The start angle of the sector blank will be set.
Set the end point of the sector blank
by operating the [EBL] dial, and then
press ENT.
The end angle of the sector blank will be set.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─47
0. EXIT
8.5 Adjustments 

Language Setting (Language)
You can switch between Japanese and English.
Procedures
Open the Equipment Setup Menu.
Press [9].
The Language Selection window will appear.
Select the language you want to
display, pressing the numeric keys [1]
to [3].
1. English
2. Japanese
3. Other
“Other” in 3. is a language
corresponding to characters created in
overseas agents.
To confirm whether or not your language is
supported, contact overseas agents or our sales
department.
To make the set language effective, turn off the
power supply and then restart.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─48
Baud Rate
1. Bearing Adjustment
0.0°
2. Range Adjustment
503
3. Tune Adjustment
32
4. TRX Setting
5. COM Port Setting
6. Nav Setting
7. Sector Blank
1. ENGLISH
2. JAPANESE
9. Language
3. OTHER
ENGLISH
0. EXIT
Maintenance Menu
This item is provided for equipment maintenance, including settings of antenna safety switch, master reset, etc.
CAUTION
Only our service engineers are to make the
adjustment.
Neglecting this caution may cause
accidents and failures.
Do not make the adjustments during navigation.
Otherwise, adjustments may affect the radar
functions, causing accidents and failures.
[1]
Scanner Safety Switch Setting (Safety Switch)
Procedures
Open the Adjust Menu.
Press [2] key.
Maintenance Menu
1. Safety Switch
STANDBY
2. Partial Master Reset
3. All Master Reset
The Maintenance Menu will appear.
Press [1] key.
4. Internal To Card2
Setting items for the scanner safety switch will
appear.
5. Card2 To Internal
Select the item you want to set,
pressing the numeric key [1] to [4].
1. TX OFF: Stops transmission. (The screen
remains in the transmission status.)
2. STANDBY: Stops transmission. (The
screen switches to the standby status)
3. TX-ON: Continues transmission without
changes. (However, errors in bearing
signals etc. are to occur due to safety
switch-off.)
4. IGNORE ERROR: Continues transmission
without changes.(Errors in bearing signals
etc. due to safety switch-off are also ignored.)
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─49
0. EXIT
8.5 Adjustments 

[II]
Partial Master Reset
Procedures
Open the Maintenance Menu.
Press [2] key.
Maintenance Menu
1. Safety Switch
STANDBY
The Partial Master Reset Execution Check
window will appear.
2. Partial Master Reset
1 YES: Execution of Partial Master Reset
2 NO: Cancellation
3. All Master Reset
Partial Master Reset resets items except for
those set in the initialization menu.
4. Internal To Card2
5. Card2 To Internal
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─50
[III]
All Master Reset (All Master Reset)
Procedures
Open the Maintenance Menu.
Press [3] key.
The All Master Reset Execution Check window
will appear.
1 YES: Execution of All Master Reset
2 NO: Cancellation
All Master Reset resets all items.
Exit
Press [RADAR MENU] key.
Maintenance Menu
1. Safety Switch
STANDBY
2. Partial Master Reset
3. All Master Reset
4. Internal To Card2
5. Card2 To Internal
The Main Menu will reappear.
0. EXIT
8─51
8.5 Adjustments 

[IV]
Copy Internal Settings to Card2 (Internal To Card2)
Execution of this item requires a memory flash card (option).
Procedures
Insert a flash memory card into the
CARD slot 2.
Open the Maintenance Menu.
Maintenance Menu
1. Safety Switch
STANDBY
Press [4] key.
2. Partial Master Reset
The execution check window will open to check
whether or not you want to copy the internal
settings to Card2.
3. All Master Reset
1 YES: Execution of copy
2 NO: Cancellation
4. Internal To Card2
5. Card2 To Internal
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─52
[V]
Read internal settings from Card2.
Execution of this item requires a memory flash card (option).
Procedures
Insert the memory flash card, in which
internal settings have been saved, into
Card slot 2.
Open the Maintenance Menu.
Press [5] key.
The execution check window will open to check
whether or not you want to read the internal
settings from Card2.
1 YES: Read
2 NO: Cancellation
Exit
Maintenance Menu
1. Safety Switch
STANDBY
2. Partial Master Reset
3. All Master Reset
4. Internal To Card2
5. Card2 To Internal
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─53
8.5 Adjustments 

Noise Level Setting (Noise Level)
[1]
Setting the noise level for signal processing (Main)
Procedures
When the Adjust Menu appears, press
[9] key.
The SP/ATA INIT Setup Menu will appear.
1. Main
140
Press [1] key.
The Noise Level Menu will appear.
Noise Level
2. Setting Mode
OFF
Press [1] key.
The Code Input Menu will open to change the
noise level value.
Change the value to display echo
correctly.
In addition to the entry on the Code Input menu,
the Multi-functional Dial Control is available to
change the value.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─54
[II]
Noise Level Adjustment Mode (Setting Mode)
Procedures
When the Adjust Menu appears, press
[9] key.
The SP/ATA INIT Setup Menu will appear.
1. Main
140
Press [1] key.
Options for Setting Mode will appear.
Noise Level
2. Setting Mode
OFF
Press [3] key.
Switching between Setting Mode ON and OFF
is done each time the key is pressed.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─55
8.5 Adjustments 

Vector Constant
Attention
l Do not change the set value carelessly.
The vector constant shall be set to 5 normally.
If the
vector constant value is higher, a target’s vector will
be better followed up when the target and own ship
change their course or speed, but the vector
accuracy will be lower on the contrary.
Procedures
Press [9] key while the Adjust Menu is
open.
The SP/ATA INIT Setup Menu will appear.
Press [2] key.
ATA
1. Vector Const
2. Video TD Level
15
The ATA Menu will appear.
3. Video High Level
Press [1] key.
The window for setting vector constants will
appear.
4. Video Low Level
Select the value you want to set,
pressing the numeric keys [1] to [8].
5. Gate Size
NARROW
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
6. Limit Ring
OFF
0. EXIT
8─56
Video TD Level
CAUTION
Do not change the set quantization level carelessly.
If
the level deviates from the proper value, the ARPA
acquisition and tracking functions will deteriorate.
Otherwise, this may cause accidents.
The quantization level determines the minimum signal level of the input video to the ARPA target detection
circuit. In this test, the value of the quantization level can be set in a range of 1 to 63.
If the value is set to a lower level, weak target echoes will be inputted to the ARPA target detection circuit, but
much radar noise will also be inputted to the circuit together, and target acquisition and tracking may be
disabled. Therefore, it is important to set a value that is 4 or 5 higher than the detected noise level.
Procedures
Press [9] key while the Adjust Menu is
open.
The SP/ATA INIT Setup Menu will appear.
Press [2] key.
ATA
1. Vector Const
2. Video TD Level
15
The ATA Menu will appear.
3. Video High Level
Press [2] key.
The Code Input Menu will appear.
Enter the Video TD Level value.
The multi-function control can also be used to
enter the value.
4. Video Low Level
5. Gate Size
NARROW
After having entered the value, press ENT.
6. Limit Ring
Exit
OFF
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─57
8.5 Adjustments 

Main Bang Suppression Level Adjustment (MBS Level)
Main Bang Suppression is adjusted to suppress main bang, a reflection signal from 3D circuit including wave
guide tube, that generally appears as a circular image focusing on the center of the radar display. Optimum
adjustment allows main bang image to remain lightly on the display.
CAUTION
Do not change this adjusted level carelessly.
Incorrect adjustment may erase targets in point-blank
range and cause collision, resulting in death or serious
injury.
This adjustment is made for settings in the processing circuit of the display unit.
Procedures
Perform the following operation before
setting.
· Set the range to 0.125 nm.
· Set the radar video enhance function.
· Set the correlation processing function to
OFF.
· Rotate the [AUTO-SEA] control to achieve
the strength with which main bang can be
judged.
· Rotate [AUTO-RAIN] control to the
minimum position (counterclockwise fully).
· Rotate [GAIN/PL] control to the maximum
position (clockwise fully).
Display the SP/ATA INIT Setup Menu.
Press [3] key.
MBS
1. MBS Level
2. MBS Area
The MBS Menu will appear.
Press [1] key.
The Code Input Menu will appear.
Enter the Main Bung Suppression
Level value.
Adjust the value to erase the main bang.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─58
0. EXIT
Main Bang Suppression Area Adjustment (MBS Area)
Adjust the main bang suppression area.
CAUTION
Do not change this adjusted level carelessly.
Incorrect adjustment may erase targets in point-blank
range and cause collision, resulting in death or serious
injury.
Procedures
Perform the following operation before
setting.
· Set the range to 0.125 nm.
· Set the radar video enhance function.
· Set the correlation processing function to
OFF.
· Rotate the [AUTO-SEA] control to achieve
the strength with which main bang can be
judged.
· Rotate [AUTO-RAIN] control to the
minimum position (counterclockwise fully).
· Rotate [GAIN/PL] control to the maximum
position (clockwise fully).
Display the SP/ATA INIT Setup Menu.
Press [3] key.
MBS
1. MBS Level
2. MBS Area
The MBS Menu will appear.
Press [1] key.
The Code Input Menu will appear.
Enter the Main Bung Suppression
Level value.
Adjust the value to erase the main bang.
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─59
0. EXIT
8.5 Adjustments 

Adjustment of NSK Unit to GYRO Compass and Log
The NSK Unit of the radar equipment is designed to be compatible with almost all types of gyro compass by
switch operation (For the step motor type, 24 VDC to 100 VDC, and for the synchro-motor type, the primary
excitation voltage is 50 VAC to 115 VAC).
Before power-on operation, the switches S1, S2, S5 and jumper JP1 on the NSK Unit (PC4201) shall be set to
the type of gyro compass in use in accordance with the procedures as described below. The gyro select switch
on the NSK Unit is set to the gyration ratio of 360X and to be compatible with the synchro type before delivery
from factory.
Check the type of the gyro compass used in own ship and make settings in the procedures below.
(1) Set the switches of the NSK Unit (PC4201) before turning on the radar equipment.
· S1: Set it to [OFF].
· S2: There are two types of gyro compasses: a compass of one type outputs a step signal, and the other
outputs a synchro signal. Make sure of the type of gyro compass used with the own ship before
setting S2.
[SYNC] .......................................Synchro signal
[STEP].........................................Step signal
· S5: Set S5 depending on the type of the gyro compass currently in use, according to the S5 setting
table.
S5-1: ..................................Set this switch assembly according to the particular type of gyro.
[OFF]........................................... Synchro signal
[ON] ............................................Step signal
S5-2, -3................................Gyration ratio
S5-2
S5-3
360X
OFF
OFF
180X
OFF
ON
90X
ON
OFF
36X
ON
ON
S5-4.....................................Gyration direction
[OFF]...........................................Normal (clockwise)
[ON] ............................................Reverse (counterclockwise)
S5-5.....................................Log type-1
[OFF]........................................... Pulse signal
[ON] ............................................Synchro signal
S5-6.....................................Not used
8─60
S5-7, -8 ............................... Log ratio
Pulse/NM (pulse signal)
800
400
200
100
Gyration/NM (synchro signal)
360X
180X
90X
36X
OFF
OFF
ON
ON
OFF
ON
OFF
ON
S5-7
S5-8
· S6:Log test. Set it to [NORMAL].
· S7: Normal or BSH(IMO) specifications selection. Set it to [NORMAL].
· Set JP1 according to the particular gyro.
[SYNC] ....................................... Synchro signal
[STEP] ........................................ Step signal
(2) Connect the gyro signal and the log signal cables to the NSK Circuit. (PC4201)
(3) Set S1 to [ON].
* After power-on operation, the switch S5-4 shall be set to [ON] if the radar video and the indicated value of
COURSE (own ship’s true bearing) is reversed.
Table 8-17
Gyro and Log Select Switches (S5 Dip Switch)
S5 Setting Table
GYRO SIG.
SYNC
STEP
360X
180X
90X
36X
DIRECTION
LOG SIG.
TYPE
Normal (NOR)
Reverse (REV)
PULSE
SYNCHRO
PULSE/NM
800P／360X
400P／180X
200P／90X
100P／30X
8─61
8.6
SETTING
True Bearing Setting (Set GYRO)
Adjust the bearing that the bearing angle of the radar is the same as that of the gyro.
Procedures
Press [RADAR MENU] key twice.
The Main Menu will appear.
Press [7] key.
The NAV Equipment Setting Menu will appear.
Press [1] key.
The Code Input Menu will appear.
Adjust true bearing value.
NAV Equipment Setting
1. Set GYRO
0.0°
2. Heading Equipment
GYRO
3. Speed Equipment
MAN
4. Manual Speed
Adjust the bearing that the bearing angle of the
radar is the same as that of the gyro.
The multi-function control can also be used to
enter the value.
0.0kts
5. MAG Compass Setting
6. Set/Drift Setting
After having entered the value, press ENT.
7. GPS Setting
Exit
Press [RADAR MENU] key.
The menu will be closed.
0. EXIT
8─62
Ship Speed Equipment Setting (Speed Equipment)
Procedures
Press [RADAR MENU] key twice.
The RADAR Menu will appear.
Press [7] key.
The NAV Equipment Setting Menu will appear.
Press [3] key.
Select a ship speed sensor from the
pull-down menu.
Types of selectable speed sensors:
1: Manual
2: Log
3: 2-axis log (NMEA signal: Speed over water)
4: 2-axis log (NMEA signal: Speed over
ground)
NAV Equipment Setting
1. Set GYRO
0.0°
2. Heading Equipment
GYRO
3. Speed Equipment
MAN
4. Manual Speed
0.0kts
5. MAG Compass Setting
6. Set/Drift Setting
7. GPS Setting
Exit
Press [RADAR MENU] key.
The menu will be closed.
0. EXIT
Attention
l The manually entered speed is effective only when
“MANUAL” is set.
l 2-axis log cannot be effective when the sentence
VBW of NMEA0183 is not entered.
8─63
8.6 Setting 

Manual Speed Setting (Manual Speed)
Procedures
Press [RADAR MENU] key twice.
Press [7] key.
NAV Equipment Setting Menu will appear.
Press [4] key.
The Code Input menu will appear.
Pressing a numeric key, enter the
value and select “ENT.”
The multi-function control is also available for
the entry.
NAV Equipment Setting
1. Set GYRO
0.0°
2. Heading Equipment
GYRO
3. Speed Equipment
MAN
4. Manual Speed
0.0kts
5. MAG Compass Setting
6. Set/Drift Setting
Note: The manually entered speed is effective only when
“MANUAL” is set.
7. GPS Setting
0. EXIT
8─64
MAG Compass Setting
Set the MAG compass.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
Press [7] key.
MAG Compass Setting
1. Heading Correction
OFF
2. Correct Value
NAV Equipment Setting Menu will appear.
0.0°E
Press [5] key.
MAG Compass Setting Menu will appear.
Press [1] key.
This item is set as to whether or not the
heading bearing is to be corrected. Switching
between ON and OFF is done each time you
press [1] key.
Press [2] key.
The Code Input Menu will appear.
Pressing a numeric key, enter the
value. Select “ENT” and then
determine the value.
0. EXIT
The correction direction and angle will be set.
On the screen, press “+” to make correction in
the eastern direction, and press “-” to make correction in the western direction. Also
enter a correction angle, pressing the numeric key.
The multi-function control is also available for the entry. To do so, enter the correction
direction, press the multi-function control, enter the correction angle, and then set ENT in
order.
Exit
Press [RADAR MENU] key.
The menu will be closed.
8─65
8.6 Setting 

Current Correction (SET/DRIFT) Setting
The current set and drift will be set.
Attention
l The manually entered speed is effective only when 1.
MANUAL or 2. 1AXIS is set in 2. SELECT SPEED of
SETTING1 Menu.
Procedures
Press [RADAR MENU] key twice.
The RADAR Menu will appear.
Press [7] key.
The NAV Equipment Setting Menu will appear.
Press [6] key.
Set/Drift Setting
1. Correction
OFF
2. Set
0.0°
3. Drift
0.0kts
The Set/Drift Setting Menu will appear.
Press [1] key to enable Correction.
The setting of Correction is switched back and
forth between ON and OFF each time [1] key is
pressed.
Press [2] key.
The Code Input Menu will appear.
Enter the direction of tendency.
The direction of tendency will be set. The
multi-function control is also available for the
entry.
After having entered the direction, press ENT.
8─66
0. EXIT
7
Press [3] key.
The Code Input Menu will appear.
Enter the speed of tendency.
The speed of tendency will be set. The multi-function control is also available for the
entry.
After having enter the value, press ENT.
Exit
Press [RADAR MENU] key.
The menu will be closed.
8─67
8.6 Setting 

Setting in GPS Receiver (GPS Process Setting)
Set an initial value in the GPS receiver (our GPS receiver).
[I]
Own ship position setting
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
Press [7] key.
2. Exclution
00 00 00 00 00 00
GPS Setting Menu will appear.
Press [1] key.
3. Geodetic
GPS Process Setting Menu will appear.
Press [1] key.
WGS-84
4. Antenna Height
The Code Input menu will appear.
Enter the latitude, press ENT, enter the
longitude, and then press ENT in order.
The multi-function control is also available to
enter the values.
00
After having entered the values, press
[9] key, and transmit the setting
contents to the GPS receiver.
0m
5. Fix Mode
2D
6. DOP Level
Up to 5
7. Position Average
LONG
Exit
Press [RADAR MENU] key.
8. Master Reset
OFF
The Main Menu will reappear.
9. Send Data
0. EXIT
8─68
[II]
Setting of Banned Satellite (Excltion)
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
2. Exclution
Press [7] key.
00 00 00 00 00 00
GPS Setting Menu will appear.
3. Geodetic
Press [1] key.
GPS Process Setting Menu will appear.
WGS-84
4. Antenna Height
Press [2] key.
The Code Input menu will appear.
Enter the number of the banned satellite.
The multi-function control is also available to
enter the values.
00
After having entered the value, press
[9] key, and transmit the setting
contents to the GPS receiver.
0m
5. Fix Mode
2D
6. DOP Level
Up to 5
7. Position Average
LONG
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8. Master Reset
OFF
9. Send Data
0. EXIT
8─69
8.6 Setting 

[III]
Geodetic System Setting (Geodetic)
Set the geodetic system in which the own ship is currently existent.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
2. Exclution
Press [7] key.
00 00 00 00 00 00
GPS Setting Menu will appear.
3. Geodetic
Press [1] key.
GPS Process Setting Menu will appear.
Press [3] key.
WGS-84
4. Antenna Height
The Code Input menu will appear.
Enter the geodetic system in accordance with
the table on the following page.
The multi-function control is also available to
enter the values.
00
After having entered the values, press
[9] key to transmit the setting contents
to the GPS receiver.
0m
5. Fix Mode
2D
6. DOP Level
Up to 5
7. Position Average
LONG
Exit
Press [RADAR MENU] key.
8. Master Reset
OFF
The Main Menu will reappear.
9. Send Data
0. EXIT
8─70
List of Geodetic Systems
No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
49
Name
WGS-84
WGS-72
Japan
North American 1927(U.S)
North American 1927(Canada & Alaska)
European 1950 (Europe)
Australian geodetic 1966 (Australia)
Ordance Survery of Great Britain (England)
NAD-83
- (No Use)
- (No Use)
ADINDAN (Etiopia & Sudan)
ARC 1950 (Botswana)
AUSTRALIAN GEODETIC 1984 (Australia)
BERMUDA 1957 (the Bermudas)
BOGOTA OBSERVATORY (Columbia)
CAMPO INCHAUSPE
CHATHAM 1971
CHUAASTRO (Paraguay)
CORREGO ALEGRE (Brazil)
DJAKARTA (VATAVIA) (Sumata)
EUROPEAN 1979 (Europe)
GEODETIC DATUM 1949 (New Zeland)
GUAM 1963 (Guam)
HAYFORD 1910 (Finland)
HJORSEY 1955 (Ice land)
INDIAN (India & Nepal)
IRELAND1965 (Ireland)
KERTAU 1948 (West Malaysia)
L.C.5 ASTRO (Cayman Black Island)
LIBERIA 1964 (Liberia)
LUZON (Philippines)
MERCHICH (Morocco)
MINNA (Cameroon)
NAHRWAN (Oman)
NAPARIMA, BWI (Trinidad & Tobago)
OLD EGYPTIAN (Egypt)
OLD HAWAIIAN (Hawaii)
PCO DE LAS NIEVES (Canary)
PROVISIONAL SOUTH AMERICAN 1956 (South America)
PROVISIONAL SOUTH CHILEAN 1963 (South Chile)
PUERTO RICO (Puerto Rico & Virgin Islands)
QORNOQ (South Greenland)
RT90 (Sweden)
SANTA BRAZ (San Miguel island & Saint Mary islands)
SOUTH AMERICAN 1969 (South America)
SOUTHWEST BASE (Faial & Sao Jorge & Pico & Graciosa & Terceira island)
TIMBALAI 1948 (Brunei & East Malaysia)
- (No Use)
8─71
8.6 Setting 

[IV]
Antenna Height Setting (Antenna Height)
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
Press [7] key.
2. Exclution
00 00 00 00 00 00
GPS Setting Menu will appear.
Press [1] key.
3. Geodetic
GPS Process Setting Menu will appear.
Press [4] key.
WGS-84
4. Antenna Height
The Code Input menu will appear.
Enter the antenna height of the own ship.
The multi-function control is also available to
enter the values.
00
After having entered the value, press
[9] key, and transmit the contents of
the settings to the GPS receiver.
0m
5. Fix Mode
2D
6. DOP Level
Up to 5
7. Position Average
Exit
LONG
Press [RADAR MENU] key.
The Main Menu will reappear.
8. Master Reset
OFF
9. Send Data
0. EXIT
8─72
[V]
Fix Mode Setting (Fix Mode)
Set the GPS fix mode.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
Press [7] key.
2. Exclution
00 00 00 00 00 00
GPS Setting Menu will appear.
3. Geodetic
Press [1] key.
GPS Process Setting Menu will appear.
Press [5] key.
00
WGS-84
4. Antenna Height
0m
From the pull-down menu, you can select the
following modes.
2D:
2D positioning only.
be acquired.
Height cannot
3D:
3D positioning can be done with
height acquired.
AUTO: 2D positioning and 3D positioning
can automatically be selected with
optimum.
After having entered the values, press
[9] key to transmit the setting
contents to the GPS receiver.
5. Fix Mode
6. DOP Level
Up to 5
7. Position Average
LONG
8. Master Reset
OFF
9. Send Data
Exit
Press [RADAR MENU] key.
The Main Menu will reappear.
8─73
2D
0. EXIT
8.6 Setting 

[VI]
HDOP Level Setting (DOP Level)
Set the HDOP level of the GPS receiver.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
Press [7] key.
2. Exclution
00 00 00 00 00 00
GPS Setting Menu will appear.
Press [1] key.
3. Geodetic
GPS Process Setting Menu will appear.
Press [6] key.
WGS-84
4. Antenna Height
From the pull-down menu, you can select a
desired level. As the value is smaller, the
precision becomes higher, but positioning grows
more difficult.
00
After having entered the values, press
[9] key to transmit the setting contents
to the GPS receiver.
0m
5. Fix Mode
2D
6. DOP Level
Up to 5
7. Position Average
Exit
LONG
Press [RADAR MENU] key.
The Main Menu will reappear.
8. Master Reset
OFF
9. Send Data
0. EXIT
8─74
[VII] Average Level Setting (Position Average)
Set the time to average position information etc. output from the GPS receiver.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
2. Exclution
Press [7] key.
00 00 00 00 00 00
GPS Setting Menu will appear.
3. Geodetic
Press [1] key.
GPS Process Setting Menu will appear.
The degree of average becomes small in order
of LONG, STANDARD and NONE. As the
degree of average is smaller, the update speed
of position information is higher but dispersion
is larger.
After having entered the values, press
[9] key to transmit the setting
contents to the GPS receiver.
0m
5. Fix Mode
Up to 5
7. Position Average
LONG
8. Master Reset
OFF
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─75
2D
6. DOP Level
9. Send Data
Exit
WGS-84
4. Antenna Height
Press [7] key.
From the pull-down menu, select the
following:
LONG,
STANDARD, and
NONE.
00
8.6 Setting 

[VII] Master Reset (Master Reset)
Transmit the master reset to the GPS receiver to initialize the GPS receiver.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
GPS Process Setting
1. Position
Press [7] key.
00’00.000
NAV Equipment Setting Menu will appear.
000’00.000
2. Exclution
Press [7] key.
00 00 00 00 00 00
GPS Setting Menu will appear.
3. Geodetic
Press [1] key.
GPS Process Setting Menu will appear.
WGS-84
4. Antenna Height
Press [8] key.
Switching between ON and OFF is done each
time you press [8] key Select ON to transmit
the reset.
00
After having entered the values, press
[9] key to transmit the setting
contents to the GPS receiver.
0m
5. Fix Mode
2D
6. DOP Level
Up to 5
7. Position Average
Exit
LONG
Press [RADAR MENU] key.
The Main Menu will reappear.
8. Master Reset
OFF
9. Send Data
0. EXIT
8─76
Setting in DGPS Receiver (DGPS Setting)
Set an initial value in the DGPS receiver (our DGPS receiver).
[I]
DGPS Mode Setting (Mode)
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
275.0KHz
50
Auto:
Manual:
Exit
4. DGPS Mode
Press [1] key.
ON
Each time [1] key is pressed, AUTO/MANUAL
is toggled.
3. Baud Rate (BPS)
Press [2] key.
DGPS Setting Menu will appear.
2. Frequency
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
DGPS Setting
Automatically sets the working
frequency of Beacon station.
Manually sets the working
frequency.
(From the next page)
After having entered the value, press
[5] key to transmit the setting contents
to the DGPS receiver.
5. Send Data
Status
No Beacon RCV connection
Frequency
--- KHz
Baud Rate
--- Baud
RSSI
---
Press [RADAR MENU] key.
The Main Menu will reappear.
8─77
0. EXIT
8.6 Setting 

[II]
Setting of Working Frequency of Beacon Station (Frequency)
This setting can be made only when Manual is selected in 1. Mode.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
275.0KHz
50
Exit
4. DGPS Mode
Press [2] key.
ON
The Code Input menu will appear.
Enter the working frequency of the Beacon
station.
The multi-function control is also available for
the entry.
3. Baud Rate (BPS)
Press [2] key.
DGPS Setting Menu will appear.
2. Frequency
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
DGPS Setting
After having entered the value, press
[5] key to transmit the setting
contents to the DGPS receiver.
Press [RADAR MENU] key.
The Main Menu will reappear.
5. Send Data
Status
No Beacon RCV connection
Frequency
--- KHz
Baud Rate
--- Baud
RSSI
---
0. EXIT
8─78
[III]
Setting of Communication Baud Rate with Beacon Station (BPS)
This setting can be made only when Manual is selected in 1. Mode.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
275.0KHz
50
Exit
4. DGPS Mode
Press [3] key.
ON
From the pull-down menu, you can select the
following transmission speeds.
3. Baud Rate (BPS)
Press [2] key.
DGPS Setting Menu will appear.
2. Frequency
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
DGPS Setting
5. Send Data
50bps
100bps
200bps
Status
Set the desired communication speed.
No Beacon RCV connection
After having entered the value, press
[5] key to transmit the setting contents
to the DGPS receiver.
Frequency
--- KHz
Baud Rate
--- Baud
RSSI
---
Press [RADAR MENU] key.
The Main Menu will reappear.
8─79
0. EXIT
8.6 Setting 

[IV]
DGPS Mode Setting (DGPS Mode)
Set the DGPS mode to ON/OFF. Setting the mode to ON allows you to acquire highly precise position
information by using information from the Beacon station. Setting the mode to OFF allows you to acquire
position information with the same precision as that of GPS.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
275.0KHz
50
4. DGPS Mode
Press [4] key.
ON
Switching between ON and OFF is done each
time you press [4] key.
3. Baud Rate (BPS)
Press [2] key.
DGPS Setting Menu will appear.
2. Frequency
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
DGPS Setting
After having entered the value, press
[5] key to transmit the setting contents
to the DGPS receiver.
5. Send Data
Status
No Beacon RCV connection
Exit
Press [RADAR MENU] key.
Frequency
--- KHz
The Main Menu will reappear.
Baud Rate
--- Baud
RSSI
---
0. EXIT
8─80
Setting in WAAS Receiver (WAAS Setting)
Make settings in the WAAS receiver (our WAAS receiver).
Because the information the WAAS receiver receives from the satellite also includes the same information as
that from DGPS Beacon station, it can perform positioning with higher precision than GPS.
[I]
WAAS Mode Setting (Mode)
Set whether or not differential information of the WAAS receiver is acquired from the Beacon or satellite.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
ON
NOT USE
4. WAAS Select Mode
Press [1] key.
AUTO
From the pull-down menu, select the
following:
BEACON,
WAAS, or
AUTO.
Exit
3. NG WAAS
Press [3] key.
WAAS Setting Menu will appear.
2. Ranging
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
WAAS Setting
After having made entry, press [6]
key to transmit the setting contents
to the WAAS receiver.
Press [RADAR MENU] key.
5. WAAS No.
120
6. Send Data
The Main Menu will reappear.
0. EXIT
8─81
8.6 Setting 

[II]
Positioning Satellite Selection/Setting (Ranging)
Set whether or not the WAAS satellite is to be used as a positioning satellite.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
ON
NOT USE
Exit
4. WAAS Select Mode
Press [2] key.
AUTO
Switching between ON (use) and OFF (not use)
is done each time you press [2] key.
3. NG WAAS
Press [3] key.
WAAS Setting Menu will appear.
2. Ranging
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
WAAS Setting
After having made entry, press [6] key
to transmit the setting contents to the
WAAS receiver.
5. WAAS No.
120
6. Send Data
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─82
[III]
Setting of Availability of Banned Satellite (NG WAAS)
Set whether or not the information from the banned WAAS satellite is to be used.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
ON
NOT USE
Exit
4. WAAS Select Mode
Press [2] key.
AUTO
Switching between USE (use) and NOT USE
(not use) is done each time you press [2] key.
3. NG WAAS
Press [3] key.
WAAS Setting Menu will appear.
2. Ranging
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
WAAS Setting
After having made entry, press [6] key
to transmit the setting contents to the
WAAS receiver.
5. WAAS No.
120
6. Send Data
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─83
8.6 Setting 

[IV]
Satellite Number Setting (WAAS Select Mode)
Set the number of the WAAS satellite to be used.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
ON
NOT USE
Exit
4. WAAS Select Mode
Press [4] key.
AUTO
Switching between Auto and Manual is done
each time you press [4] key.
3. NG WAAS
Press [3] key.
WAAS Setting Menu will appear.
2. Ranging
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
WAAS Setting
After having made entry, press [6] key
to transmit the setting contents to the
WAAS receiver.
5. WAAS No.
120
6. Send Data
Press [RADAR MENU] key.
The Main Menu will reappear.
0. EXIT
8─84
[V]
Satellite Number Setting (WAAS Select Mode)
Set the number of the WAAS satellite to be used.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
AUTO
ON
NOT USE
4. WAAS Select Mode
Press [5] key.
AUTO
The Code Input menu will appear.
Enter numeric values between Nos.120 and
138.
The multi-function control is also available to
enter the values.
Exit
3. NG WAAS
Press [3] key.
WAAS Setting Menu will appear.
2. Ranging
Press [7] key.
GPS Setting Menu will appear.
1. Mode
Press [7] key.
NAV Equipment Setting Menu will appear.
WAAS Setting
After having made entry, press [6] key
to transmit the setting contents to the
WAAS receiver.
Press [RADAR MENU] key.
5. WAAS No.
120
6. Send Data
The Main Menu will reappear.
0. EXIT
8─85
8.6 Setting 

GPS Reception Status Display (GPS Status)
Display the reception status of the GPS receiver (GPS, DGPS and WAAS receivers) currently connected.
Seize the status of satellites that are currently performing positioning.
Procedures
Press [RADAR MENU] key twice.
The Radar Menu will appear.
Press [7] key.
Press [7] key.
GPS Setting Menu will appear.
3. WAAS Setting
4. GPS Status
Press [4] key.
GPS Status Menu will appear.
Exit
1. GPS Process Setting
2. DGPS Setting
NAV Equipment Setting Menu will appear.
GPS Setting
0. EXIT
Press [0] key.
The Status Menu will be closed.
Press [RADAR MENU] key.
The menu will be closed.
8─86
GPS STATUS
DATE /TIME
(UTC)
L/L
---------------
FIX MODE
ALT
DOP LEVEL
---
SATELLITE No.
---
---
---
---
---
---
FIX
---
---
---
---
---
---
AZIMUTH
---
---
---
---
---
---
ELEVATE
---
---
---
---
---
---
LEVEL
---
---
---
---
---
---
STATUS
---
---
---
---
---
---
SATELLITE No.
---
---
---
---
---
---
FIX
---
---
---
---
---
---
AZIMUTH
---
---
---
---
---
---
ELEVATE
---
---
---
---
---
---
LEVEL
---
---
---
---
---
---
STATUS
---
---
---
---
---
---
RSSI
---
0. EXIT
GPS Status Display
8─87
8.6 Setting 

The following items are to appear on the Status display.
DATE/TIME
(UTC)
L/L
Local date and time
Greenwich Mean Time
Current latitude and longitude
FIX MODE
ALT
DOP LEVEL
Fix Mode (2D positioning/3D positioning)
Altitude of own ship. Setting the Fix Mode to 2D displays the antenna height initially
set.
Precision of positioning results. As the value is smaller, the indicated precision is
higher.
SATELLITE No.
FIX
AZIMUTH
ELEVATE
LEVEL
STATUS
RSSI
Satellite No.
Is positioning data used?
Azimuthal angle of satellite
Elevation angle of satellite
Reception signal level
Current status of satellite
Reception intensity of Beacon station
8─88
Date/Time Display Setting (Date/Time Setting)
In displaying the time, it is necessary to set the LOCAL TIME, LOCAL DATE and GMT+/-.
Procedures
Press [RADAR MENU] key twice.
The RADAR Menu will appear.
Press [8] key.
The RADAR SUB Menu will appear.
2. Local Date
1971/01/01
Press [4] key.
The Date/Time Setting Menu will appear.
Date/Time Setting
1. UTC/LOCAL
OFF
Press [1] key.
1. UTC/LOCAL
3. Local Time
00:00
4. Time Zone
+00:00
will be selected.
The setting is switched back and forth between
UTC (Coordinate Universal Time) and LOCAL
(local time) each time [1] key is pressed.
Press [2] key.
The Code Input Menu will appear.
Enter the date.
The date will be set. The multi-function control
is also available for the entry.
After having enter the date, press ENT.
Press [3] key.
The Code Input Menu will appear.
8─89
0. EXIT
8.6 Setting 

8 Enter the time.
The time will be set. The multi-function control is also available for the entry.
After having enter the time, press ENT.
9 Press [4] key.
The Code Input Menu will appear.
10 Enter the time difference.
The time difference will be set. The multi-function control is also available for the entry.
After having enter the value, press ENT.
Exit
Press [RADAR MENU] key.
The menu will be closed.
Attention
l Time correction is not available when the “ZDA”
sentence of NMEA0183 is not received.
8─90
Adjustment of Performance Monitor (NJU-63/64)
* Execution of this item needs a PM unit (option).
Procedures
Set the radar to Master Radar when the Interswitch is installed.
Press VRM1 key to display VRM1 and set the range of VRM1 to 10-18*
NM.
The Equipment Setup Menu will
appear in accordance with the
instructions of section 8.5.
Press [4] key.
TRX Setting
1. Antenna Height
5-10m
The TRX Setting Menu will appear.
Press [4] key.
The Code Input Menu will appear.
Enter a set value.
4. PM Adjustment
Adjust the PM pattern so that its outer edge is
within 10 to 18 NM. The multi-function control
is also available for the entry. After having
enter the value, press ENT.
Attach the INFORMATION LABEL
provided with the performance
monitor to an appropriate position on
the display unit.
7. Output Pulse
2048
8. Antenna Location
0. EXIT
0m
8─91
0m
8.6 Setting 

Press [RADAR MENU] key twice.
The RADAR Menu will appear.
Test Menu
1. Self Test
Press [8] key.
2. Monitor Test
The RADAR Sub Menu will appear.
10 Press [9] key.
3. Panel Test
4. PM Display
The Test Menu will appear.
ON
11 Press [4] key, and set PM Display to
ON.
5. Error Logging
6. System INFO
The PM bar will appear.
12 Write the value indicated by the PM
bar and the check date to the
INFORMATION LABEL you have
attached to the display unit in step 7.
MAGI
PM
0. EXIT
8─92
HL
Adjust the PM pattern using the ten-key
or multi-function control so that its outer
edge is within 10 to 18 NM.
10 to
18 NM
PM Pattern
Exit
Press [RADAR MENU] key.
The menu will be closed.
Note:
· All target acquisitions by ARPA functions will be cancelled when PM is ON.
The target acquisition cancelled will not be recovered.
· The radar image is suppressed to make the PM image easier to see.
Therefore, the PM Display should be turned OFF after PM check is completed.
8─93

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XMP Toolkit                     : XMP toolkit 2.9.1-14, framework 1.6
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Author                          : s-iseki
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Japan Radio NKE2252 25KW X-Band Radar Transceiver User Manual

Japan Radio Co Ltd. 25KW X-Band Radar Transceiver

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Instruction manual 2 of 3

FCC ID Filing: CKENKE2252

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