Furuno Ch250 150 225 Operators Manual

2015-08-11

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SAFETY INSTRUCTIONS
TABLE OF CONTENTS
FOREWORD
SYSTEM CONFIGURATION
1. OPERATIONAL OVERVIEW
2. HORIZONTAL MODE
3. VERTICAL FAN MODE
4. ECHO SOUNDER MODE
5. MENU OPERATION
6. MAINTENANCE, TROUBLESHOOTING
MENU TREE
SPECIFICATIONS
INDEX

COLOR LCD

SEARCHLIGHT SONAR

CH-250/CH-250S

OPERATOR'S MANUAL

www.furuno.co.jp

MODEL

Back

The paper used in this manual

is elemental chlorine free.

・FURUNO Authorized Distributor/Dealer

9-52 Ashihara-cho,

Nishinomiya, 662-8580, JAPAN

Telephone : +81-(0)798-65-2111

Fax

+81-(0)798-65-4200

A : MAR 2000

Printed in Japan

P : APR . 08, 2011

Pub. No. OME-13160-P

*00080894815**00080894815*

(DAMI ) CH-250/250S

00080894815

* 0 0 0 8 0 8 9 4 8 1 5 *

Ni-Cd Pb

IMPORTANT NOTICES

General

• The operator of this equipment must read and follow the descriptions in this manual.

Wrong operation or maintenance can cancel the warranty or cause injury.

• Do not copy any part of this manual without written permission from FURUNO.

• If this manual is lost or worn, contact your dealer about replacement.

• The contents of this manual and equipment specifications can change without notice.

• The example screens (or illustrations) shown in this manual can be different from the

screens you see on your display. The screens you see depend on your system

configuration and equipment settings.

• Save this manual for future reference.

• Any modification of the equipment (including software) by persons not authorized by

FURUNO will cancel the warranty.

• All brand and product names are trademarks, registered trademarks or service marks of

their respective holders.

How to discard this product

Discard this product according to local regulations for the disposal of industrial waste. For

disposal in the USA, see the homepage of the Electronics Industries Alliance

(http://www.eiae.org/) for the correct method of disposal.

How to discard a used battery

Some FURUNO products have a battery(ies). To see if your product has a battery, see the

chapter on Maintenance. Follow the instructions below if a battery is used. Tape the + and -

terminals of battery before disposal to prevent fire, heat generation caused by short circuit.

In the European Union

The crossed-out trash can symbol indicates that all types of

batteries must not be discarded in standard trash, or at a trash site.

Take the used batteries to a battery collection site according to your

national legislation and the Batteries Directive 2006/66/EU.

In the USA

The Mobius loop symbol (three chasing arrows) indicates that Ni-Cd

and lead-acid rechargeable batteries must be recycled. Take the used

batteries to a battery collection site according to local laws.

In the other countries

There are no international standards for the battery recycle symbol. The number of symbols can

increase when the other countries make their own recycling symbols in the future.

SAFETY INSTRUCTIONS

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel

should work inside the

equipment.

Immediately turn off the power at the

switchboard if water leaks into the

equipment or something is dropped in

the equipment.

Continued use of the equipment can cause

fire or electrical shock. Contact a FURUNO

agent for service.

Do not disassemble or modify the

equipment.

Fire, electrical shock or serious injury can

result.

Immediately turn off the power at the

switchboard if the equipment is emitting

smoke or fire.

Continued use of the equipment can cause

fire or electrical shock. Contact a FURUNO

agent for service.

Make sure no rain or water splash leaks

into the equipment.

Fire or electrical shock can result if water

leaks in the equipment.

WARNING

Keep heater away from equipment.

A heater can melt the equipment's power

cord, which can cause fire or electrical

shock.

Use the proper fuse.

The fuse in the hull and transceiver units

protect them from overvoltage, equipment

fault and reverse polarity of the ship's

mains. If a fuse blows replace it with fuse of

the same amperage. Use of a wrong fuse

can result in equipment damage.

Retract the transducer before turning

off the power.

Damage to the equipment may result.

Wait until the transducer switch [

↑

] lights

steadily and then turn off the power.

iii

CAUTION

Do not exceed 20 knots when operating

the equipment and do not exceed 15

knots when lowering or raising the

transducer.

The transducer may become damaged.

Do not use the equipment for other

than its intended purpose.

Use of the equipment as a stepping stool,

for example, may result in personal injury

or damage to the equipment.

Warning labels are attached to the

display, transceiver and hull units. Do

not remove the labels. If a label is

missing or illegible, contact a FURUNO

agent or dealer.

TFT LCD

The high quality TFT (Thin Film Transistor)

LCD displays 99.999% of its picture ele-

ments. The remaining 0.01% may drop out

or light, however this is an inherent property

of the LCD; it is not a sign of malfunction.

WARNING

To avoid electrical shock, do not

remove cover. No user-serviceable

parts inside.

TRANSCEIVER UNIT

Name: Warning Label (1)

Type: 86-003-1011-1

Code No.: 100-236-231

DISPLAY UNIT

Name: Warning Label (1)

Type: 86-003-1001-1

Code No.: 100-236-741

WARNING

Moving shaft can pinch and cut.

Keep hands clear while operating.

Lockout power before servicing.

HULL UNIT

Name: "Finger Catch"

Warning Label

Type: 06-021-4015-0

Code No.: 100-281-590

CAUTION

WORKING WITH THE SONAR OIL

Precautions

Q

Keep oil away from eyes. Wear pro-

tective gloves when working with the oil.

The oil can cause inflammation of the

eyes.

Q

Do not touch the oil. Wear protective

gloves when working with the oil. The

oil can cause inflammation of the skin.

Q

Do not ingest the oil. Diarrhea and

vomiting may result.

Q

Keep the oil out of reach of children.

Emergency procedures

Q

If the oil enters eyes, flush with clean

water about 15 minutes. Consult a

physician.

Q

If the oil is ingested, see a physician

immediately.

Disposal of oil and its container

Dispose of oil and its container in accord-

ance with local regulations. For further

details, contact place of purchase.

Storage

Seal container to keep out foreign material.

Store in dark, cool place.

TABLE OF CONTENTS

FOREWORD ............................................................................................. vi

SYSTEM CONFIGURATION ................................................................... viii

1. OPERATIONAL OVERVIEW ............................................................ 1-1

1.1 Control Description.................................................................................................. 1-1

1.2 Remote Controller................................................................................................... 1-2

1.3 Turning the Power On/Off........................................................................................ 1-3

1.4 Raising, Lowering the Transducer ........................................................................... 1-4

1.5 Adjusting Screen Brilliance, Panel Dimmer ............................................................. 1-5

1.6 Selecting a Display.................................................................................................. 1-6

1.7 Adjusting the Gain................................................................................................... 1-7

1.8 Basic Menu Operation............................................................................................. 1-7

2. HORIZONTAL MODE .......................................................................2-1

2.1 Operational Overview.............................................................................................. 2-1

2.2 Typical Horizontal Mode Display ............................................................................. 2-2

2.3 Selecting the Range................................................................................................ 2-3

2.4 Selecting Sector Width............................................................................................ 2-4

2.5 Selecting Train Center............................................................................................. 2-5

2.6 Selecting the Tilt Angle............................................................................................ 2-5

2.7 Selecting the Training Speed................................................................................... 2-9

2.8 Finding Echo Position with the Cursor..................................................................... 2-9

2.9 Event Marker......................................................................................................... 2-10

2.10 Depth and Horizontal Range Markers ................................................................... 2-11

2.11 Adjusting the Picture ............................................................................................. 2-12

2.12 Target Lock ........................................................................................................... 2-17

2.13 Horizontal Menu Overview .................................................................................... 2-21

2.14 Interpreting the Horizontal Display......................................................................... 2-23

3. VERTICAL FAN MODE .................................................................... 3-1

3.1 Operational Overview.............................................................................................. 3-1

3.2 Typical Vertical Fan Mode Display........................................................................... 3-2

3.3 Selecting the Range................................................................................................ 3-3

3.4 Selecting Train Center............................................................................................. 3-4

3.5 Selecting Display Sector ......................................................................................... 3-5

3.6 Selecting Sector Center .......................................................................................... 3-6

3.7 Selecting the Training Speed................................................................................... 3-7

3.8 Finding Echo Position with the Cursor..................................................................... 3-7

3.9 Event Marker........................................................................................................... 3-8

3.10 Depth and Horizontal Range Markers ..................................................................... 3-9

3.11 Adjusting the Picture ............................................................................................. 3-10

3.12 Vertical Menu Overview......................................................................................... 3-12

3.13 Interpreting the Vertical Fan Display...................................................................... 3-13

4. ECHO SOUNDER MODE ................................................................. 4-1

4.1 Operational Overview.............................................................................................. 4-1

4.2 Typical Echo Sounder Display................................................................................. 4-2

4.3 Selecting the Range................................................................................................ 4-3

4.4 Train Direction......................................................................................................... 4-4

4.5 Selecting Tilt Angle.................................................................................................. 4-4

4.6 Selecting Picture Advance Speed............................................................................ 4-4

4.7 Measuring Range by Cursor.................................................................................... 4-5

4.8 Event Marker........................................................................................................... 4-5

4.9 Range Marker ......................................................................................................... 4-7

4.10 Adjusting the Picture ............................................................................................... 4-7

4.11 Echo Sounder Menu Overview.............................................................................. 4-10

5. MENU OPERATION.......................................................................... 5-1

5.1 COM1 Menu............................................................................................................ 5-1

5.2 COM2 Menu............................................................................................................ 5-3

5.3 Short-cut Menu, Preset Menu.................................................................................. 5-4

5.4 SYS Menu............................................................................................................... 5-9

6. MAINTENANCE, TROUBLESHOOTING.......................................... 6-1

6.1 Preventive Maintenance.......................................................................................... 6-1

6.2 Cleaning the Equipment .......................................................................................... 6-1

6.3 Hull Unit Maintenance ............................................................................................. 6-2

6.4 Transducer Maintenance......................................................................................... 6-3

6.5 Fuse Replacement.................................................................................................. 6-3

6.6 Troubleshooting ...................................................................................................... 6-4

6.7 Error Messages....................................................................................................... 6-5

6.8 Diagnostics ............................................................................................................. 6-6

6.9 Test Pattern............................................................................................................. 6-8

MENU TREE..........................................................................................M-1

SPECIFICATIONS ............................................................................... SP-1

INDEX .................................................................................................. IN-1

FOREWORD

Thank you for purchasing the CH-250/CH-250S Color LCD Searchlight Sonar. We are confident

you will discover why FURUNO has become synonymous with quality and reliability.

Dedicated in the design and manufacture of marine electronics equipment for half a century,

FURUNO Electric Company has gained an unrivaled reputation as a world leader in the industry.

This is the result of our technical excellence as well as our worldwide distribution and service

network.

Please carefully read and follow the safety information and operating and maintenance

instructions set forth in this manual before attempting to operate the equipment and conduct any

maintenance. Your sonar will perform to the utmost of its ability only if it is operated and

maintained in accordance with the correct procedures.

Features

The CH-250/CH-250S displays underwater objects on a bright 10.4” color LCD display, in 8 or

16 colors according to received echo strengths. Operating frequency is selectable among 60, 88

and 150 kHz for CH-250 and 180 and 240 kHz for CH-250S. Eight operating modes provide

information for virtually any fishing application.

The main features of the CH-250/CH-250S are

• High definition active matrix color LCD.

• Target lock on a fish school or stationary position (reef, etc.).

• Audible detection of echoes frees the operator from continuous watch of the display.

• Compact display and hull units permit installation where space is limited.

• Interface IF-8000 permits use of a commercial monitor instead of standard display unit.

• Automatic pulselength switching for optimum performance in short and long ranges.

• Eight operational modes: Horizontal, Expanded Horizontal, Vertical Fan, Echo Sounder,

Horizontal/Vertical Fan, History, Video Plotter and Strata.

• Automatic retraction of transducer at operator-selected ship’s speed between 5 and 15 knots.

• CUSTOM MODE keys provide one-touch setup of the equipment or short-cut key function.

• Tracing of ship’s track with connection of position-fixing equipment (GPS, etc.).

• One of the echo strengths may be displayed in white to enhance the specific echo level.

• The “Vertical Search” feature provides a cross-sectional view of the vertical plane, which is

useful for evaluating fish school concentration.

vii

Usage Precautions

• The Motion Sensor MS-100 compensates for ship’s pitching and rolling. However, it does not

compensate for load unbalance.

• If the equipment will not be used for a long time shut off the power to it at the mains

switchboard to prevent battery discharge.

• If the soundome is to be operated while the ship is dry-docked set the transmitter output

power to “minimum” on the COM1 menu. Damage to the train-tilt section may result if it is

operated with maximum transmitter power.

• When the ship is dry-docked check for signs of corrosion on the soundome. Find the reason

for the corrosion and attach a zinc plate to the hull unit as an anticorrosion measure if

necessary.

viii

SYSTEM CONFIGURATION

HULL UNIT

SPEAKER

DATA/VIDEO OUT

MOTION SENSOR

12-32 VDC

Note 1

12-32 VDC

Speaker

Motion Sensor

MS-100

VGA Ext.

Monitor

Control Unit

Display

Unit

CONTROL UNIT CH-252

Remote

Controller

CH-256

12/24-32 VDC

Navigator

Note 2

MONITOR UNIT MU-100C

Note 1: MU-100C is the standard supply

monitor unit. An external monitor

may be connected via the

interface unit (option). The drawing

above shows the system configuration

with the MU-100C. The monitor unit and

control unit can be installed separately

(optional mounting kit required).

Note 2: For blackbox type, MU-100C is

not supplied. Connect external

monitor and control unit to the

interface unit.

TRANSCEIVER UNIT

CH-253

INTERFACE UNIT IF-8000

How to remove the hard cover (blackbox type only)

Place your thumbs at the locations shown with

circles in the illustration at right, and then lift the

cover while pressing it with your thumbs.

HULL UNIT

CH-254/254S

CH-255/255S

1-1

1. OPERATIONAL OVERVIEW

1.1 Control Description

Turns the power on/off.

Lowers the transducer.

Adjusts receiver

sensitivity.

Selects center bearing of training sector.

Selects detection range.

Controls tilt angle.

Selects center direction of

the vertical scanning sector.

Omnipad

Shifts cursor.

Selects menu items, options.

Opens/closes

menu.

Inscribes/erases event

marker.

Inscribes/erases range

and bearing markers.

Adjusts display

brilliance.

Selects scan speed (sonar)/picture

advancement speed (echo sounder).

Selects width of

training sector.

Alternately selects main

and sub windows in

combination displays.

Provide short-cut

key or one-touch

setup.

Select display mode.

Raises the transducer.

Switches training sector to 360˚

(horizontal mode), or 180˚ (vertical fan mode).

Horizontal/History

Vertical Fan

Horizontal/Video Plotter Horizontal/Vertical Fan

Horizontal/Strata

Horizontal

Expanded Horizontal

Echo Sounder

Turns target lock on/off.

Figure 1-1 Control unit

1-2

1.2 Remote Controller

The Remote Controller CH-256 (option) provides armchair control over range, tilt, target lock

and range of sounding.

Select tilt angle.

Enables/disables

target lock.

Selects range of sounding

for full circle 360˚ (horizontal mode)

or half circle 180˚ (vertical fan mode).

Select display

range.

Figure 1-2 Remote controller

Note: The remote controller can also be used with a commercial monitor.

1-3

1.3 Turning the Power On/Off

1.3.1 Power on

This sonar has a demonstration mode which lets the operator become acquainted with the

features of the sonar. For further details see page 5-18.

Press the [POWER] switch on the control unit till hear “click.” A beep sounds, the lamp above

the switch lights and the last-used display appears.

Note: Wait at least five seconds before reapplying the power.

1.3.2 Power off

1. Press the [↑

]

switch on the control panel. The lamp above the switch blinks while the

transducer is being raised and lights steadily when it is fully raised.

Transducer status indicator

• Up arrow is filled when transducer

has been retracted into the tank.

• Down arrow is filled when transducer

has been fully lowered.

• Appropriate arrow flashes during

raising/lowering of transducer.

NOTE: When the transducer is being

raised automatically (auto raise feature),

the arrows are filled and the up arrow

flashes. When the transducer has been

fully retracted, the up arrow lights

and the down arrow becomes hollow.

2. Press the [POWER] switch after the [↑

]

switch lights steadily.

Note 1: The transducer is automatically retracted into the tank if the [POWER] switch is

pressed before retracting the transducer. However, for safety purposes, make it a habit

to retract the transducer before turning off the power.

Note 2: After changing settings, wait at least one minute before turning off the equipment to

allow the equipment to memorize settings, and start up with them at the next powering

of the equipment. No harm will result to the equipment if this not done.

1-4

1.4 Raising, Lowering the Transducer

1.4.1 Lowering the transducer

With the boat at the fishing ground, press the [↓] switch to lower the transducer. The lamp

above the switch blinks while the transducer is being lowered and lights when it is completely

lowered. The down arrow of the transducer status indicator at the top right corner of the display

is filled when the transducer is completely lowered.

CAUTION

Do not exceed 20 knots when operating

the equipment and do not exceed 15

knots when lowering or raising the

transducer.

The transducer may become damaged.

1.4.2 Raising the transducer

Press the [↑] switch to raise the transducer. The lamp above the switch blinks while the

transducer is being raised and lights steadily when it is fully raised. The up arrow of the

transducer status indicator at the top right corner of the display is filled when the transducer is

fully retracted.

Note 1: With speed input, the transducer can be raised automatically when the ship’s speed

exceeds a preset speed between 5 and 15 knots. If speed data is erroneous the

transducer may be raised at a speed different from the preset speed. For further details

about the automatic retraction feature, see AUTO RETRACTION on page 5-12.

Note 2: An alarm may sound depending on ship’s speed. For details see page 5-13.

1-5

1.5 Adjusting Screen Brilliance, Panel Dimmer

Screen brilliance can be adjusted in nine steps and panel dimmer (backlighting) in four.

1. Press the [BRILL] key to open the dialog box for screen brilliance and panel dimmer. Do the

next step within four seconds, otherwise the dialog box will be erased.

DIMMER:3

BRILL:3

Figure 1-3 Brilliance, panel dimmer dialog box

2. Operate or to adjust screen brilliance (0 is the lowest brilliance; 9 the highest). Note

that continuous pressing of the [BRILL] key also changes the brilliance level.

3. Operate or to adjust the panel dimmer (0 is the lowest level; 4 is the highest).

4. Press the [MENU] key to register settings and close the dialog box. Note that the dialog box

is automatically erased if there is no control operation within about four seconds.

Note 1: The brilliance of a commercial monitor cannot be adjusted with the [BRILL] key. Use the

associated control on the monitor.

Note 2: For the supplied monitor unit, if you turn off the power with the brilliance set at minimum

the screen will show nothing at next power-up. In this case press the [BRILL] key

several times.

1-6

1.6 Selecting a Display

This sonar has eight display modes and you may select one with one of the DISPLAY MODE

keys. Refer to the chapter shown in the illustration for more information about each mode.

Water temp/depth

Key Key

VERTICAL FAN

Vertical section of underwater conditions

appears on the entire screen. (Chapter 3)

NAV

DATA

ECHO SOUNDER

NAV

DATA

A-SCOPE

DISPLAY

NAV DATA

HORIZONTAL/HISTORY

The horizontal picture appears in the main

window; the history picture in the sub

window. Useful for showing history of fish

movement, distribution. (Chapter 2)

Picture

NAV DATA

HORIZONTAL/VIDEO PLOTTER

The horizontal picture appears in the main

window and the video plotter picture, which

traces ship's track, in the sub window.

(Chapter 2)

NAV DATA

HORIZONTAL/VERTICAL FAN

NAV

DATA

HORIZONTAL

This mode provides 360 degree coverage.

Useful for general search. (Chapter 2)

HORIZONTAL/STRATA

The horizontal picture appears in the main

window; the strata picture in the sub window.

The strata picture shows bottom undulatons

in different colors. It is useful in bottom

trawling to avoid projections. (Chapter 2)

The horizontal picture appears in the main

window; the vertical fan picture in the sub

window. (Chapter 3)

NAV DATA

Picture

EXPANDED HORIZONTAL

Zoomed horizontal picture appears over

the entire screen. (Chapter 2)

NAV

DATA

Using a fixed spot beam this display

shows fish echoes below or around the

vessel. (Chapter 4)

Figure 1

Display modes

1-7

1.7 Adjusting the Gain

The [GAIN] control adjusts the sensitivity of the receiver. Normally, the control is adjusted so

that the bottom echo is displayed in reddish-brown mixed with red. Initially set the gain between

“4” and “6” and then fine tune depending on fishing ground, etc.

Too Low Proper Too High

Figure 1-5 How to adjust the gain

1.8 Basic Menu Operation

The menu, consisting of six menus, mostly contains items which once preset do not require

frequent adjustment. Below is the procedure for basic menu operation.

1. Press the [MENU] key to open the menu.

Note: Either PRESET (default setting) or SHORT-CUT appears between ES and SYS at

the top of the screen depending on the setting of CUSTOM KEY on the SYSTEM

SETTING 1 menu, and they set the function of the custom keys [1], [2], [3]. For

further details see pages 5-3 through 5-7.)

DELETING TRACK NO

WHITE MARKER OFF

SIG LEVEL OFF

COLOR 16

BKGD COLOR

BEARING READOUT 2

RELATIVE

: SELECT : CHANGE MENU: END

MENU COM1 HORZ VERT ES PRESET SYSCOM2

Figure 1-6 COM2 menu

1-8

2. The last-used menu is displayed. (In Figure 1-6 the COM2 menu is selected.) To select a

different menu, press to select MENU at the top of the screen and then press or to

select menu desired.

3. Press or to select menu item desired. At the bottom of the screen menu help is

provided.

4. Press ► to open the corresponding dialog box. The example below shows the dialog box for

DELETING TRACK in the COM2 menu.

DELETING TRACK

NO YES

Figure 1-7 Dialog box for deleting track

5. Press or to select option desired. If the option requires selection of numeric data, use

or to lower or raise the figure, respectively.

6. Press or to return to the menu, or press the [MENU] key to register your selection

and close the menu.

2-1

2. HORIZONTAL MODE

2.1 Operational Overview

The figure below shows the typical horizontal mode operating sequence.

Lower the

transducer.

Adjust gain.

6(a).

Set scanning sector.

Set center bearing of train

sector.

Set range.

Set tilt angle.

Adjust screen

brilliance.

6(b).

Select training sector for

full circle.

Select appropriate

horizontal mode.

10.

Measure range and

bearing to target with cursor.

11.

Adjust menu settings

(ex. TVG) as required.

Turn on the power.

Figure 2-1 Control panel

2-2

2.2 Typical Horizontal Mode Display

R 40 m

T 40˚

B208˚

CSE 357˚

SPD 9.9 kt

DEP 35 m

TMP 12.3˚C

CUR 11.0˚

2.0 kt

GAIN 5.3

TVG LEVEL 4.0

DISTANCE 200 m

COLOR

34˚ 12. 343' N

134˚ 34. 213' W

B7˚

B234˚

Cursor data Train indicator

Sector marker

Range

Tilt angle

Tilt angle indicator

(Indicates transducer tilt angle.)

Horizontal max. range

Vertical max.

depth

Tilt angle

Own ship marker

ETA marker

Fish echo

Bottom echo

Range marker

Bearing marker

Event marker

Cursor

Event marker data Ship's

track*

Range and bearing

markers data

Current vector*

Target lock indicator

Interference

rejector

Position in latitude*,

longitude*

Course*, speed*

Depth,

water temperature*

Tide direction*,

tide speed*

Gain setting

TVG level,

distance settings

Color bar

CUR 11.0˚

2.0 kt

* Requires appropriate

sensor.

Depth marker*

(See note at

left.)

Range and bearing markers

* Depth marker

When depth data is input from

external equipment, the depth

marker shifts according to depth

data. If the depth data is greater

than the horizontal range, the

depth marker shifts to lowest position.

(DEMO)

Demonstration

mode

North marker*

Transducer status indicator

Filled arrow: Respective action

completed

Blinking arrow: Action in progress

Sweep indicator

(Shows train position

in horizontal mode.)

WNE

Figure 2-2 Typical horizontal mode display

With the tilt angle lowered, your ship is at the center, the bottom, which appears in

reddish-brown color, is displayed as a circle and fish echoes appear within the circle.

2-3

2.3 Selecting the Range

The [RANGE] control selects the detection (display) range. Select the range according to either

the fish species being searched or the depth desired. 15 ranges are available and minimum and

maximum ranges depend on the transducer used.

SEA SURFACE

Range indicated

on the screen.

BOTTOM

SEA SURFACE

Range indicated

on the screen.

BOTTOM

Figure 2-3 How to select the range

Default horizontal mode range settings

60 kHz 88 kHz 150 kHz 180 kHz 240 kHz

Range m ft m ft m ft m ft m ft

No.1 10 40 10 40 10 40 10 40 10 30

No.2 20 80 20 80 20 80 20 80 20 60

No.3 40 120 40 120 40 120 40 120 30 90

No.4 80 200 80 200 60 200 60 200 40 120

No.5 120 300 120 300 80 300 80 300 60 150

No.6 160 400 160 400 120 400 100 400 80 200

No.7 200 500 200 500 160 500 120 500 100 250

No.8 250 600 250 600 200 600 160 600 120 300

No.9 300 800 300 800 250 700 200 700 160 400

No.10 400 1000 400 1000 300 800 250 800 200 500

No.11 500 1500 500 1500 400 1000 300 1000 250 600

No.12 600 2000 600 2000 500 1500 400 1200 300 800

No.13 800 3000 800 2500 600 2000 500 1500 400 1000

No.14 1200 4000 1000 3500 800 2500 600 2000 500 1500

No.15 1600 5000 1200 4000 1000 3500 800 2500 600 2000

Normally the range is set so that the bottom is traced at the lower part of the screen (like an

echo sounder). Each time the [Range] control is operated the newly selected range briefly

appears in large characters at the screen top. Range is always displayed at the right-hand

corner of the screen.

Note 1: Unit of range measurement may be selected for meters, feet, fathoms, passi/braza or

Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page

5-10.

Note 2: Ranges may be freely preset as desired. For details see page 5-14.

2-4

2.4 Selecting Sector Width

Sector means the width of the transducer training.

96°Display sector

(shown: 96˚)

Figure 2-4 Display sector

The [SECTOR] control selects the training (display) area among the sixteen positions shown in

the table below. Clockwise rotation of the control increases the sector width; counterclockwise

rotation decreases it.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Sector

width (°) 6 24 48 72 96 120 144 168 192 216 240 264 288 312 336 360

In the full-circle mode (360°) the direction of training is clockwise; in the half-circle mode the

direction is clockwise to counterclockwise alternately.

One-touch selection of 360°

°°

° sector

Each pressing of the [FULL/HALF] key alternately selects 360° sector (full circle) or 168° sector

(half circle). If the [SECTOR] control is operated following the selection of the full-circle display,

the next pressing of the [FULL/HALF] key presents the full-circle display.

Full circle

Sector set with

SECTOR control

FULL/HALF

key

Half circle

168°

FULL/HALF

key

Figure 2-5 How the FULL/HALF key works

2-5

2.5 Selecting Train Center

The [TRAIN] control selects the center direction of the detection range. The range of adjustment

is 0° to 354° in increments of 6°. The selected bearing is shown with a filled circle, the train

indicator, on the bearing scale.

0˚ (360˚) → 6˚ → 12˚ → 18˚ → ... 354˚

Train indicator

Sector

Figure 2-6 Train center

2.6 Selecting the Tilt Angle

The tilt angle shown the direction to which the

sound wave is emitted. When the sound

wave is emitted horizontally, the tilt angle is

said to be 0° and when emitted vertically, 90°.

To set a tilt angle, operate the [TILT] control.

Watch the tilt angle indication and tilt angle

indicator at the top right corner of the screen.

The tilt angle can be set in increments of 1°

from 0° to +5° (upward) to 0° to 90°

(downward).

Select tilt angle depending on target fish. For

surface fish select a narrow angle (about 5°)

and for bottom fish, a wide angle (about 40°).

+5˚

0˚Horizontal direction

Transducer

Sounding beam

90°Vertical direction

Tilt angle setting range

2-6

2.6.1 Bottom echo and tilt angle

Refer to the illustration below.

Case1: Tilt angle 30°

°°

° to 40°

°°

This tilt angle will display the entire bottom since it is captured by the full width of the beam.

Case2: Tilt angle 10°

°°

° to 20°

°°

This tilt angle will only display half the bottom since it is only captured by the lower half of the

beam.

Case3: Tilt angle 0°

°°

° to 5°

°°

This tilt angle may or may not capture the bottom since the returning echo is weak.

2.6.2 How to discriminate fish echoes from the bottom

The figure at the bottom of the page illustrates how two fish schools “a” and “b” are displayed on

the screen using three different tilt angles.

Case 1(Tilt angle 30°

°°

° to 40°):

°):°):

°): Fish school is obscured by the bottom.

Case 2(Tilt angle 10°

°°

° to 20°):

°):°):

°): Fish school is located above the bottom (midwater).

Case 3(Tilt angle 0°

°°

° to 5°):

°):°):

°): Fish school is located close to the bottom.

Case 1 Case 2 Case 3

Bottom

Case 1

Bottom

Case 2 Case 3

Fish school "b"

Bottom

Fish school "b"

Fish school "a" Fish school "a"

Fish school "a"

Figure 2-7 Fish echo and tilt angle

2-7

Points to consider

Normally, a vertically distributed fish school is a better sonar target than the bottom, because it

reflects the transmitted pulse back toward the transducer.

In case 3, both fish schools “a” and “b” are presented. Generally speaking, however, midwater

fish schools tend to be larger than bottom fish schools and they are often displayed near the

bottom on the display.

It is difficult to detect bottom fish when they are not distributed vertically.

2.6.3 Tilt angle for surface fish

Sound emitted from the sonar transducer forms an oval-shaped beam with a width of

approximately 12° (for 60 kHz transducer at –3 dB) in the vertical direction (vertical beam width).

The tilt angle is indicated by the angle between the center line is parallel with the sea surface

and one half of the emitted sound goes upward, toward the sea surface.

This causes one half of the emitted sound to be reflected toward the transducer and displayed

on the screen as sea surface reflections. When the sea is calm, since the sound is reflected just

like reflections become negligible.

However if the sea is not calm enough, they will become dominant and interfere with

observation of wanted echoes. To minimize these sea surface reflections and to search fish

schools effectively, the tilt angle is usually set between 5° and 6° so the upper portion of the

beam becomes almost parallel with the sea surface. When the sea is rough, the tilt angle is

slightly increased to lessen the affect of sea surface reflections.

Tilt angle 0°

Sea surface

Tilt angle 5-7°

Sea surface

12°

Figure 2-8 Tilt angle

2-8

2.6.4 Suitable tilt angle

The figure below illustrates the relationship among tilt angle, depth and detection range. Refer

to it to find out the suitable tilt angle for a given depth/detection range.

100

(200) 200

(400) 300

(600)

400

(800)

Range (m)

0°

5°

10°

15°

20(40)

40(80)

60(120)

80(160)

100(200)

200(400)

Vertical width of sonar beam

12°21 m

100 m100 m

300 m

63 m

200 m

Depth (m)

42 m

Tilt angle and beam coverage (frequency 60 kHz, vertical beamwidth 12° at -3 dB)

Figure 2-9 Tilt angle and beam coverage

2-9

2.7 Selecting the Training Speed

The training speed selects how fast the transducer scans the sounding sector. Two choices are

available, normal speed (default setting) and high speed, and one may be selected with the

[FAST SCAN] key. Each time the key is pressed “NORM” (normal speed) or “FAST” (high

speed) momentarily appears at the screen top.

Normal (6°) : 60 transmissions required to complete full 360° picture (default setting).

High (12°) : 30 transmissions required to complete the full 360° picture.

The time necessary to train a full circle depends on range and transducer used. The table below

shows the time required to complete one full circle in the horizontal mode using the 150 kHz

transducer.

Ranges 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

m 10 20 40 60 80 120 160 200 250 300 400 500 600 800 1000

Unit ft 40 80 120 200 300 400 500 600 700 800 1000 1500 2000 2500 3500

Norm 7 7 7 7 7 10 13 16 20 24 32 40 48 64 81

Time

required

(sec) for

one full

circle Fast 7 7 7 7 7 9 11 13 15 17 21 25 28 36 45

Note1: Above data for soundome having serial no. 1000 and higher.

Note2: The range setting must be at least 160 m to active high speed training, using the 150

kHz transducer. The [FAST SCAN] key is inoperative when the range setting is less

than 160 meters.

2.8 Finding Echo Position with the Cursor

The cursor measures horizontal range, depth and bearing. Operate the Omnipad to place the

cursor where desired. Cursor position data appears at the top left-hand corner on the screen.

: Horizontal range

: Depth

B: Bearing

Cursor position data

Cursor

NAV

DATA

Figure 2-10 Location of cursor position data

2-10

2.9 Event Marker

The event marker functions to mark important locations on the screen, and five event markers

may be inscribed. Each time the [EVENT] key is pressed the “latest event marker” (⊕) is

inscribed at the cursor location and all previously entered event markers are shown by the

“previous event marker” (+). When the capacity for event markers is reached the eldest event

marker is erased from the screen to make room for the latest.

Note 1: With position data the event marker moves with ship’s movement. The event marker

can be inscribed without position data, however it will be stationary.

Note 2: The event marker cannot be inscribed from the sub window (strata, history and video

plotter displays). It can only be inscribes from the main window.

Note 3: Event marker position can be output to external equipment and marked on the display

of the external equipment. Each press of the [EVENT] key outputs event marker

position. For details see TARGET L/L on page 5-11.

Note 4: The tilt angle must be less than 75 degrees to use this feature.

2.9.1 Inscribing the event marker

1. Operate the Omnipad to place the cursor on the location desired for an event marker.

2. Press the [EVENT] key to inscribe the event marker. Event marker data appears at the

bottom left-hand corner.

NAV

DATA

"Latest event

marker"

Event marker data

→: Horizontal range

B: Bearing

"Previous event marker"

Display area

To delete all event markers,

place the cursor outside the

display area and press the

[EVENT] key.

Figure 2-11 How to use the event marker

2-11

2.9.2 Deleting all event markers

All event markers can be erased from the screen as follows:

1. Operate the Omnipad to place the cursor outside the display area.

2. Press the [EVENT] key to show the following dialog box. Do the next step within four

seconds, otherwise the dialog box will be erased.

DELETE EVENT MARK?

YESNO

3. Press to select YES and press the [MENU] key. All event markers are erased from the

screen.

2.10 Depth and Horizontal Range Markers

The horizontal range, depth and bearing to a fish school can be measured by using the range

and bearing markers.

1. Operate the Omnipad to place the cursor on the location desired.

2. Press the [R/B] key to display the range and bearing markers. Horizontal range, depth and

bearing to the cursor location are shown at the bottom right-hand corner of the screen..

3. To erase the range and bearing markers, place the cursor outside the display area and

press the [R/B] key, or place the cursor on the range or bearing marker and press the [R/B]

key.

Bearing marker

Range marker

NAV

DATA

Range and bearing

markers data

→:Horizontal range

↓: Depth

B: Bearing from ship's bow

Figure 2-12 Range and bearing markers

2-12

2.11 Adjusting the Picture

2.11.1 Suppressing bottom and surface reflections

In shallow fishing grounds, excessive sea surface and bottom reflections often interfere with

wanted fish echoes and they cannot be eliminated sufficiently with the TVG controls. In such

cases, try to reduce the output power, without turning down the gain. The picture becomes

clearer when output power is reduced rather than when the gain is decreased.

1. Press the [MENU] key to open the menu.

2. Press to select MENU and then press to select the COM1 menu.

TX POWER MAX

PULSELENGTH LONG

TX RATE 10

INT REJECT OFF

AGC OFF

: SELECT : CHANGE MENU: END

MENU COM1 HORZ VERT ES PRESET SYSCOM2

AUDIO LEVEL 0

Figure 2-13 COM1 menu

3. Press or to select TX POWER and press . The following dialog box appears.

TX POWER

MAX MIN

4. Press to select MIN. (For long range detection be sure to return the setting to MAX.)

5. Press the [MENU] key to register your selection and close the menu.

2-13

2.11.2 Suppressing bottom tail

As described earlier, fish schools near the bottom are sometimes difficult to detect because you

have to discriminate fish echoes from the bottom reflections. To discriminate fish echoes near

the bottom, select the short Tx pulselength on the COM1 menu to decrease the tail of bottom

reflections.

1. Press the [MENU] key to open the menu.

2. Press to select MENU and then press to select the COM1 menu.

3. Press or to select PULSELENGTH and press . The following dialog box appears.

PULSELENGTH

LONG SHORT

4. Press to select SHORT.

5. Press the [MENU] key to register your selection and close the menu.

2.11.3 Displaying weak echoes clearly

Echoes from targets (such as the bottom or a fish) return to the transducer in order of the

distance to them, and when their intensities are compared at the transducer face, those from

nearer targets are generally stronger when their reflecting properties are nearly equal. The

sonar operator will be quite inconvenienced if these echoes are directly displayed on the screen,

since he won’t be able to judge the actual size of the target from the size of echoes displayed on

the screen. To overcome this inconvenience, use the TVG function. It compensates for

propagation loss of sound in water: amplification of echoes on short range is suppressed and

gradually increased as range increases, so that similar targets are displayed in similar

intensities irrespective of the ranges to them.

The TVG also functions to suppress unwanted echoes and noise which appears in a certain

range area on the screen.

Without TVG Proper TVG setting

Noise caused by

strong reflection

of surface

turbulence.

Nearer target

echoes appear

in larger size.

Reduce

gain for

nearby

areas,

using

TVG.

Echoes of equal

size targets are

presented in the

same color and size.

Noise is rejected.

Figure 2-14 How TVG works

Note: Excessive TVG may eliminate short-range echoes.

2-14

To adjust TVG:

1. Press the [MENU] key to open the menu.

2. Press to select MENU and then press to select HORZ.

TVG LEVEL 4.0

TVG DISTANCE 4.0

GAIN ADJUST 0

RES. COLOR LOG

CLUTTER 0

TARGET KEY REVERSE

: SELECT : CHANGE MENU: END

MENU COM1 VERT ES PRESET SYSCOM2 HORZ

LOCK MODE AUTO

AUTO TILT OFF

Figure 2-15 HORZ menu

3. Press or to select TVG DISTANCE and press . The following dialog box appears.

4.0

200

TVG DISTANCE

4. Press or to adjust TVG distance between 3.0 and 5.0 (130-320 m). As a general rule,

use a higher setting for low frequency transducer; a lower setting for high frequency

transducer. The larger the figure the greater the distance at which TVG works. When you

open the TVG dialog box the TVG line changes from solid to dashed and a solid line

denotes current TVG setting.

TVG

Distance

Setting 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

. . . .

10.0

Meters 3 8 20 40 60 100 130 160 200 250 320

. . . .

1000

Feet 10 30 70 130 210 330 410 520 660 820 1040

3280

Passi/braza 2 5 10 20 40 60 80 100 120 150 180

600

Hiro 2 5 10 20 40 60 80 100 130 170 210

. . . .

660

2-15

5. Press the [MENU] key to register your selection and close the menu.

6. To suppress reflections by the sea surface or plankton, select TVG LEVEL and press .

7. Press or to adjust TVG LEVEL, considering sea conditions. A setting between 2.0 and

5.0 should provide satisfactory results. The higher the figure the less the gain over distance.

8. Press the [MENU] key to register your selection and close the menu.

9. Watch a distant fish echo which is approaching own ship. Adjusting the tilt angle so the fish

echo is within the sounding beam. Observe color of fish echo. If the color and size of the

echo stay the same as the echo approaches own ship, the TVG setting is proper. If the echo

suddenly becomes smaller, the TVG level may be too high.

2.11.4 Erasing weak echoes

Weak echoes such as interfere can be erased from the screen. This is useful when you want to

observe a fish school echo.

1. Press the [MENU] key to open the menu.

2. Press to select MENU.

3. Press to select COM2.

4. Press or to select SIG LEVEL.

5. Press to open the dialog box.

SIG LEVEL

OFF 114

(OFF, 1-14)

OFF

8-color display: OFF, 1-6

16-color display: OFF, 1-14

6. Press or to select echo color to erase. Pressing erases echoes from weak to

strong in ascending order of strength. You can also see which echo color is erased by

watching the color bar.

7. Press the [MENU] key to register your selection and close the menu.

2-16

2.11.5 Enlarging fish echoes (expand horizontal display)

Fish echoes may be enlarged 1.5 times by using the expanded horizontal display. Press the key

to show the expanded horizontal display. The direction of expansion depends on the train

direction as below.

Train center direction Position after expansion Remarks

318° –42° Moves to screen bottom For viewing forward

48° –123° Moves to left side of screen For viewing starboard side

138° –222° Moves to screen top For viewing aft

228° -312° Moves to right side of screen For viewing port side

Train indicator

Sector marker

Own ship

marker

Cursor

CSE 357

SPD 9.9 kt

DEP 35 m

TMP 12.3˚C

CUR 11.0˚

2.0 kt

GAIN 5.3

TVG LEVEL 4.0

DISTANCE 200 m

COLOR

34° 12. 343' N

134° 34. 213' W

CUR 11.0

2.0 kt

R 40 m

T 40

Range

Tilt angle

→14

↓ 12

B46

Cursor position data

Train

position

Figure 2-16 Expanded horizontal display

2-17

2.12 Target Lock

Three types of target lock modes are available.

Manual reverse: The transducer train direction is reversed manually. This is the default

setting, and is available in the horizontal and vertical fan modes.

Position: Tracks stationary position (such as a reef) using position data from a

navigator. Available in the horizontal mode only.

Echo: Tracks fish echo either manually or automatically. Available in the horizontal

mode only.

2.12.1 Setting target lock mode

1. Press the [MENU] key to open the menu.

2. Press to select MENU and then press or to select the HORZ menu.

3. Press or to select TARGET KEY.

4. Press to show following dialog box.

TARGET KEY

REVERSE POS ECHO

5. Press or to select option desired.

6. Press the [MENU] key to register your selection and close the menu.

2.12.2 Manual reverse mode

The transducer train direction is reversed manually, thereby emphasizing possible fish echoes.

Note: This function is inoperative in the echo sounder mode. In the vertical fan mode the

manual reverse mode is automatically selected regardless of the setting in paragraph

2.12.1.

To activate the manual reserve mode:

1. Select REVERSE following the procedure in paragraph 2.12.1.

2. Press the [TARGET] key to reverse the transducer train direction when a fish school

appears. “REVERSE” momentarily appears at the screen top when the key is pressed and

then the transducer train direction is reversed.

2-18

2.12.3 Position mode

This mode tracks a stationary position (such as a reef) using position data fed from a navigator.

Note1: This function is inoperative in the echo sounder mode. In the vertical fan mode the

reverse mode is automatically selected regardless of the setting in paragraph 2.12.1.

Note2: This mode requires position data. When there is no position data the message “NO

POSITION DATA.” appears for five seconds and tracking is automatically cancelled.

Check the navigator.

Note3: The tilt angle must be less than 75 degrees to use this feature.

To use the position mode:

1. Select POS following the procedure in paragraph 2.12.1.

2. Use the Omnipad to select the location to track.

3. Press the [TARGET] key.

The message “POS LOCK” appears momentarily at the screen top, the target lock marker is

displayed at the cursor position and the target lock indicator appears at the top right-hand

corner of the screen while tracking (with position data from external equipment) is occurring.

If the position goes out of the display area target lock is automatically cancelled and the

target lock indicator and target lock marker disappear. The SECTOR, TILT and TRAIN

controls are inoperative since they are automatically adjusted.

Target lock indicator

Target lock marker

Figure 2-17 Target lock indicator

4. To turn off the target lock, press the [TARGET] key again. The message “LOCK END”

momentarily appears, the target lock marker and the target lock indicator disappear and

previously used sector, train and tilt settings are restored. Also, latitude and longitude

indication returns to normal.

2-19

2.12.4 Echo mode

The echo mode tracks a fish school either automatically or manually. The default setting is

automatic, and you can select automatic or manual with “LOCK MODE” in the HORZ menu.

Automatic echo tracking mode

The automatic echo target lock function automatically tracks a fish school appearing in the

operator-selected target lock zone. If the tracked fish school goes out of the zone in the range

direction, tracking is suspended until it or a new fish school comes into the zone.

To use the automatic echo tracking mode:

1. Select ECHO following the procedure in paragraph 2.12.1.

2. If necessary select LOCK MODE to AUTO (default setting ) on the HORZ menu.

3. Press the [TARGET] key. The dialog box below appears at the screen center, the message

“ECHO LOCK” appears for three seconds at the top of the screen, the target lock area

appears in the current train area and the target lock indicator appears at the right-hand side

of the screen.

TARGET LOCK AREA.

: INSIDE

: OUTSIDE

4. Use the [SECTOR] and [TRAIN] controls and the Omnipad to set the detection area. Do not

include bottom echoes in the zone, so that target lock will not be activated by bottom

echoes.

When a target of red or reddish-brown color is detected in the zone, the target lock indicator

blinks and a buzzer sounds to call the operator’s attention. The [SECTOR], [TILT] and

[TRAIN] controls are inoperative since they are automatically adjusted. When you attempt

to operate shoes controls the message “TARGET LOCKING NOW.” appears.

NAV

DATA

Target lock

indicator

Outer limit

Inner limit

Figure 2-18 Target lock area

2-20

When the fish echo is lost the tilt angle is automatically changed as below to continue tracking

the echo:

Tilt changed to search [(A + 10˚) → (A - 10˚) →A]

Detection area displayed once again and target

lock indicator lights.

A: Tilt angle at start of target lock

5. To turn off the target lock, press the [TARGET] key again. The message “LOCK END”

appears for three seconds at the screen top, the target lock indicator disappears and

operation continues with current train and tilt settings.

Manual echo tracking mode

1. Select ECHO following the procedure in paragraph 2.12.1.

2. Select LOCK MODE to MANUAL on the HORZ menu.

3. Press the [TARGET] key when a wanted target echo appears.

The message “ECHO LOCK” appears along with the target lock indicator. Then, the

transducer train direction is reversed and searching starts with the current tilt angle. When a

target echo appears the transducer train direction is again reversed automatically, the

buzzer sounds and the target lock indicator blinks.

If the fish echo is lost the tilt angle is automatically changed to continue tracking as below.

1. Tilt angle is changed by +10˚ (A+10˚).

(A is the tilt angle used when tracking began.)

2. Tilt angle is changed by -10˚ (A-10˚).

3. If the echo could not be found, tracking is

cancelled and tilt angle A is restored.

4. To quit the target lock, press the [TARGET] key again. The message “LOCK END” appears

momentarily.

2-21

2.13 Horizontal Menu Overview

This section presents an overview of the items on the HORZ menu.

1. Press the [MENU] key to open the menu.

2. Press to select MENU and then press or to select the HORZ menu.

TVG LEVEL 4.0

TVG DISTANCE 4.0

GAIN ADJUST 0

RES. COLOR LOG

CLUTTER 0

TARGET KEY REVERSE

: SELECT : CHANGE MENU: END

MENU COM1 VERT ES PRESET SYSCOM2 HORZ

LOCK MODE AUTO

AUTO TILT OFF

Figure 2-19 HORZ menu

3. Press or to select item desired.

4. Press to show corresponding dialog box.

5. Press or to select option desired.

6. Press the [MENU] key to register your selection and close the menu.

2.13.1 Horizontal menu description

TVG LEVEL: Compensates for propagation loss of sound in water. Default setting is 4.0. For

further details, see paragraph 2.11.3 on page 2-13.

TVG DISTANCE: As above. Default setting is 4.0.

GAIN ADJUST: Compensates for too weak or too strong echo level. Adjust it when the gain on

the horizontal mode when it is not the same as that on the vertical fan and echosounder modes.

Setting range: -10 to +10. Default setting is 0.

2-22

CLUTTER: Low intensity echoes, often caused by sediments in water, are painted on the

screen as a large number or random dots. This noise can be suppressed. The higher the

number (setting) the weaker the echoes which are erased.

RES. COLOR: Sets transfer characteristics of input signal level versus display echo level. Echo

strength is emphasized in order of CUBE, SQUARE, LINEAR, LOG, and you can observe the

characteristics of each by watching the color bar as you change the setting.

LOG: Displays weak to strong echoes in their respective levels. This is the default setting,

and is suitable for general use.

LINEAR: Downplays the weak echoes when compared with LOG. Effective for suppressing

weak echoes such as plankton.

SQUARE: Strong echoes are emphasized more than in LINEAR.

CUBE: Strong echoes are emphasized even more than in SQUARE.

TARGET KEY: Selects target lock function among reverse, position and echo. Default setting is

REVERSE. For further details see paragraph 2.12 on page 2-17.

LOCK MODE: Selects how to track fish echo in ”echo” target lock; automatically or manually.

Default setting is AUTO. For further details see paragraph 2.12 on page 2-17.

AUTO TILT: Turns automatic tilt on or off, and the default setting is OFF. The choices are ±2°,

±4°, ±6°, and ±10°. Automatic tilt adjusts the tilt angle in the following sequence:

B → (B-A) → B → (B+A) → B → (B-A) → B → (B+A)…

B: Current tilt angle

A: Auto tilt setting

For example, the tilt angle is 30° and the automatic tilt setting is 4°. Then, the tilt angle is

changed in the following sequence: 30° → 26° → 30° → 34° → 30°→ 26° → 30° → 34°…

Note: The [TILT] control is inoperative when automatic tilt is active.

2-23

2.14 Interpreting the Horizontal Display

This section provides information necessary for interpreting the horizontal display.

2.14.1 How the horizontal mode picture is painted

The wide sounding beam is emitted from the soundome at a certain tilt angle (see hatched area

in the figure below). The information (target echoes) obtained by this beam is displayed in

sectors of increments of 12° of the screen. Thus, all directions around the boat are sounded in

30 times of transmissions.

Note: When the “FAST SCAN” is switched off, the equipment operates in a narrow sounding

beam. Then, the echoes appear on a 6° sector in each transmission, so 60

transmissions are required to complete the full 360° picture (6°x 60=360°). This means

that training speed is slower. However, since transmission power is concentrated into the

narrow sounding beam, a superior detection range is obtained. Furthermore, since the

bottom contour is painted distinctly, bottom fish may be more easily detected.

Sounding Beam Screen Display

Tilt: θ

Sounding

Beam

Tilt: θ

Train: 6˚*

When the narrow sounding beam (6˚)

is selected 60 transmissions are required

to complete the full circle.

*12˚ When high speed training is

selected.

Figure 2-20 How the horizontal mode picture is painted

2-24

2.14.2 Sample echo displays

Bottom echoes

When the tilt angle is changed, the bottom echo illustrated below will appear on the display.

When the tilt is decrease (toward 0°), the bottom trace becomes winder and weaker. By

observing the bottom condition on the display, the skipper can prevent net damage.

(A) Flat bottom

Tilt angle: 10˚ to 15˚

(B) Flat bottom

Tilt angle: 20˚ or more

Bottom

Shallow bottom

is displayed in

a strong color

and with a

short tail.

Bottom is displayed

narrower and in

stronger colors when

compared to (A).

Decreased tilt angle

Only half of

vertical beam width

captures the bottom.

The deeper, sloping

bottom echo is displayed

in a weak color and

with a long tail.

Figure 2-21 Bottom echoes

2-25

Fish schools

A fish school appears as a mass of echoes on the screen. The color of the mass shows the

density of fish schools on the sonar beam. To find distribution and center point of a fish school,

try several different tilt angles.

(A) Sea surface fish

Tilt angle: 0˚ to 10˚

(B) Midwater, bottom fish Tilt angle: 30˚ or more

Fish echo which appears before bottom can be detected.

Tilt angle: 0˚ to 20˚

Fish echo which appears together with

or after bottom can be detected.

Bottom

Fish

school

Sea surface

reflections

Fish

school

Bottom echo not

displayed because

of decreased tilt angle.

Sea surface

reflections are

present.

Fish

school

Large midwater

fish school is

present.

Bottom

When the tilt angle is shallow,

the reflection echo from bottom

is weak and the fish echo

which appears from bottom

is easy to find.

Figure 2-22 Fish schools

2-26

Sea surface reflections

To reduce sea surface reflections, set the tilt angle to 5° or higher, so the upper edge of the

sonar beam does not hit the sea surface, or adjust TVG. When a decreased tilt angle is used,

sea surface reflections cover a large area as illustrated below.

Sea surface

17˚

Tilt angle

indication

Sea surface

reflections

17˚

Figure 2-23 Sea surface reflections

Wake

A wake produced by own ship or another ship can be a strong reflecting object when a

decreased tilt angle is used. As the wake appears as a thick continuous line, it can be easily

distinguishes from a fish school. A wake contains many air bubbles which attenuate ultrasonic

energy, making it difficult to sound beyond the wake.

Own

ship

Other

ship

Wake produced

by other ship

Own ship's

screw noise

Own ship's

screw noise

Own ship's wake

(produced when

own ship turned)

Figure 2-24 Wake

2-27

Sidelobe echo (false echo)

An ultrasonic wave is emitted only in the direction set by the [TILT] control, however there are

some emissions outside the main beam. These are called sidelobes. The energy of the sidelobe

is fairly weak but when the water is comparatively shallow and the bottom is rocky and hard,

strong signals are detected by the sidelobe. These are represented on the display as a false

echo as shown below.

Mainlobe

Sidelobe

Mainlobe echo

Sidelobe echo

The bottom echo

detected by sidelobe

appears at a certain

tilt angle when the

sidelobe points ver-

tically. Also, poor

soundome projection

may result in a similar

false echo.

Figure 2-25 Sidelobe echoes

Noise and interference

When the fishing ground is crowded with many fishing boats, the sonar is subject to interference

from ultrasonic equipment (echo sounder or sonar) on other boats as well as those on own ship.

For instance, interference from the sonar operated on other boats will show itself on the display

as in (A) in the figure below. This interference can be suppressed by changing the Tx rate on

the COM1 menu. Noise from marine life shows itself on the displays as in (B) in the figure below.

This type of noise can be suppressed with the interference rejector on the COM1 menu.

(A) Inteference from (B) Interference from

other sonars (yours marine life

or other's)

Figure 2-26 Noise and interference

2-28

2.14.3 Combination display examples

Horizontal/history display

Press the key to display the horizontal/history display.

Cursor

Own ship

marker

Horizontal Display HIstory Display

Bottom echo

Fish echo

R 40 m

T 40˚

Range

Tilt angle

Tilt angle indicator

CSE 357˚ SPD 9.9 kt

34° 12. 343' N

134° 34. 213' W Position in latitude*,

longitude*

Course*, speed*

Target lock indicator

Interference rej. ON

Cursor position

data

→17

↓ 14

B148˚

* Requires appropriate

sensor input.

Transducer status

indicator

Train

position

Figure 2-27 Horizontal/history display

The horizontal display appears in the main window; the history display in the sub window. The

length of the picture displayed in the history display is equal to about four full circle pictures.

Thus the history display enables you to observe the history of fish movement and distribution. It

is also useful for detecting bottom fish, reefs and sunken vessels.

The history display cannot be adjusted.

2-29

Horizontal/video plotter display

Press the

key to display the horizontal/video plotter display.

Cursor

Own ship

marker

Horizontal Display Video Plotter Display

500

Track*

→15

B 195°

Event marker

Event marker data Track*

Event marker

(Entered from

horizontal mode)

Sonar range marker

(Radius changes with

video plotter range.)

Scale

R 40 m

T 40˚

Range

Tilt angle

Tilt angle indicator

CSE 357˚ SPD 9.9 kt

34° 12. 343' N

134° 34. 213' W Position in latitude*,

longitude*

Course*, speed*

Target lock indicator

Interference rej. ON

Cursor position

data

→18

↓ 15

B154˚

* Requires appropriate

sensor.

Transducer status

indicator

Train

position

Figure 2-28 Horizontal/Video Plotter display

The horizontal display appears in the main window; the video plotter display, which traces ship’s

track on the display, in the sub window. Compared to the horizontal display the video plotter’s

range is much longer. For example, an event marker entered on the horizontal display

disappears from that display when it goes out of the current range. However, it remains on the

video plotter display for a much longer time when a long range scale is used. This can be useful

when you want to return to the location denoted with an event marker. To display track on the

horizontal display, the tilt angle must be less than 75 degrees.

You may switch control between the horizontal display and the video plotter display with the

[MAIN/SUB] key. The message MAIN WINDOW CONTROLLABLE or SUB WINDOW

CONTROLLABLE appears with each pressing of the key. A red rectangle circumscribes the sub

window when it is selected. With the video plotter display selected you may change its range

with the [RANGE] control.

Note: Controls other than RANGE may only be operated from the main window. When you

attempt to operate them when the sub window is selected the message SELECT MAIN

WINDOW appears.

The video plotter display cannot be adjusted.

2-30

Horizontal/strata display

Press the key to display the horizontal/strata display.

CSE 357˚ SPD 9.9 kt

34° 12. 343' N

134° 34. 213' W

R 40 m

T 40˚

→12

↓ 10

B133˚

PORT STBD

Cursor position

data Range

Tilt angle

Tilt angle indicator

Cursor

Target lock indicator

Interference rej. ON

Position in latitude*,

longitude*

Course*, speed*

Own ship

marker

Horizontal Display

(main display) Strata Display

(sub window)

Color bar

for strata

display

0°+90°

-90°

Heading

Number of lines increases

by one with each train.

Top line is latest; bottom

line is oldest.

* Requires appropriate

sensor input.

Transducer status

indicator

Train

position

Figure 2-29 Horizontal/strata display

The horizontal display appears in the main window; the strata display in the sub window. The

strata picture shows bottom undulations in different colors. This is useful in bottom trawling to

avoid projections which may damage the net.

Coverage for the horizontal mode is 360° picture, and for the strata display it is maximum 90°

from port to 90° starboard.

The strata display may be adjusted with the [RANGE] and [SECTOR] controls. Press the

[MAIN/SUB] key to select the main or sub window. The message MAIN WINDOW

CONTROLLABLE or SUB WINDOW CONTROLLABLE appears with each pressing of the key.

A red cursor appears in the sub window when it can be controlled.

2-31

Color bar for the strata display

The depth of the bottom each in all directions is displayed in the sub window, in the colors set by

the color bar for the strata display. The color bar for the strata display shows search angle range

below 336 degrees.

Color bar for

strata display

-6

-12

-18

-90

Strongest

color Weakest

color

The undulation of the bottom echo in all directions

is shown by the colors on the color bar for the

strata display.

The position of the weakest echo can be changed with the [RANGE] control, and the width of

each color on the color bar for the strata display with the [SECTOR] control.

Use the [SECTOR] control to

adjust width of each color.

Weakest color

Use the [RANGE] control to move

the location of the weakest echo color.

Note: TILT, TRAIN, FULL/HALF, FAST SCAN, R/B, EVENT, TARGET, CUSTOM MODE

controls may only be operated from the main window. When you attempt to operate

them from the sub window the message “SELECT MAIN WINDOW.” appears for about

four seconds.

Flat bottom and strata display

PORT STBD +90˚

-90˚

Each layer on the strata

display is equal to one

train on the horizontal

display.

The color of this position

on the color bar is the

color of point "a" on the

strata display.

When the bottom is flat

the horizontal display

inscribes the bottom as a

true circle, and the strata

display inscribes the color

of point "a".

Color "a"

on the color bar

Color "a"

Figure 2-30 Flat bottom and strata display

2-32

Projection in fore direction and strata display

Color "b" on the color bar

is displayed here.

Color "a" on

the color bar

Color "b" Color

"a"

PORT STBD +90˚

-90˚

Figure 2-31 Projection in fore direction and strata display

Depth becoming shallower gradually in fore direction and strata display

Color "b"

Color "c"

Color "a"

PORT STBD +90˚

-90˚

Color "d"

Color "c"

Color "a"

Figure 2-32 Depth becoming shallower gradually in fore direction and strata display

Depth becoming deeper gradually in fore direction and strata display

bColor "a"ad

bcc +90˚

-90˚

Color "a" Color "c"

Color "b"

Color "d"

Figure 2-33 Depth becoming deeper gradually in fore direction

3-1

3. VERTICAL FAN MODE

3.1 Operational Overview

The figure below shows the typical vertical fan mode operating sequence.

Lower the transducer.

Adjust gain.

7(a).

Set scanning sector.

Set center bearing of train

sector.

Set range.

Set tilt angle.

3. Adjust screen

brilliance.

7(b).

Select training sector 180˚.

Select appropriate

vertical fan mode. 10.

Measure range and

bearing to target with cursor.

11.

Adjust menu settings

(ex. TVG) as required.

Turn on the power.

Figure 3-1 Control panel

3-2

3.2 Typical Vertical Fan Mode Display

+→6

↓ 145 R → 60 m

↓ 100 m

340˚

Cursor position

data

Horizontal range

Vertical range

Event marker

Interference

rejector ON

Heading*

60 60

Horizontal range scale

Bearing indicator

(Shows training direction.)

STARBOARD

PORT

FORE

AFT

Own

ship

Training indicator

FORE AFT

Sector center

indicator

Fish echo

Bottom

echo

Cursor

100

Depth

Vertical range scale

Horizontal

marker

Horizontal range marker

CSE 357˚

SPD 9.9 kt

DEP

35 m

TMP

12.3˚C

CUR 11.0˚

2.0 kt

GAIN 5.3

34° 12. 343' N

134° 34. 213' W

TVG LEVEL 4.0

DISTANCE 200 m

COLOR

Position in latitude*,

longitude*

Course*, speed*

Depth

Tide direction*,

tide speed*

Gain setting

TVG level,

distance settings

Color bar

Water temperature*

* Requires appropriate

sensor.

Horizontal

range

Transducer status indicator

Filled arrow: Respective action completed

Blinking arrow: Action in progress

Sweep indicator

(Shows tilt angle

in vertical fan mode.)

Figure 3-2 Typical vertical fan mode display

3-3

3.3 Selecting the Range

The [RANGE] control selects the detection (display) range, in 15 settings. Select the range

according to either the fish species being searched or the depth desired. Each time the control

is operated the newly selected range briefly appears in large characters at the screen top.

Range is permanently displayed at the top right-hand corner of the screen.

Normally the range is set so that the bottom is traced at the lower part of the screen (like an

echo sounder).

Surface

Bottom

RANGE m

Figure 3-3 Range concept

Default vertical fan mode range settings

Unit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Meters 10 20 30 40 60 80 100 120 160 200 250 300 400 500 600

Feet 30 60 90 120 150 200 250 300 400 500 600 800 1000 1500 2000

Note 1: Unit of range measurement may be selected for meters, feet, fathoms, passi/braza or

Hiro (Japanese) with UNIT on the SYSTEM SETTING 1 menu. For details see page

5-10.

Note 2: Ranges may be freely preset as desired. For details see page 5-16.

3-4

3.4 Selecting Train Center

The [TRAIN] control determines the bearing of the vertical fan beam, from 0° to 180°. Bearing of

beam position can be found with the train indicator.

0˚ (360˚) → 6˚ → 12˚ → 18˚ → ... 180˚

Train Indicator Train of Vertical Fan Beam

Bow

TRAIN

Train indicator

Figure 3-4 Train indicator

STBD

FORE AFT

Train 0˚ Train 90˚ Train 180˚

Figure 3-5 Train indicator and display

3-5

3.5 Selecting Display Sector

Sector means the width of the transducer training, from 6° to 180°.

24˚Sector (Shown: 24˚)

Figure 3-6 Sector

The [SECTOR] control selects the training area among the sixteen positions shown in the table

below. Clockwise rotation of the control increases the sector width; counterclockwise rotation

decreases it.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Sector

width (°) 6 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180

One-touch selection of 180°

°°

sector

1. Press the [FULL/HALF] key. A half-circle display of 180° is presented.

2. Press the [FULL/HALF] key again, and a 120°-sector display is presented.

Note: Operating the [SECTOR] control between steps 1 and 2 in the procedure above displays

the 180° sector at the next pressing of the [FULL/HALF] key.

24˚

FULL/HALF

key

Sector set with

SECTOR control Half circle

180˚0˚180˚0˚

120˚

FULL/HALF

key

180˚

Figure 3-7 How the FULL/HALF key works

3-6

3.6 Selecting Sector Center

The center direction of the sounding beam in the vertical direction can be changed with the

[TILT] control. The setting range is 0° to 180° in increments of 6°. Select the setting which

places the sector center in the middle of the detection range.

Sector

range

180˚

0˚

In the example display at left, the sector

center indicator is starboard, and the

width of the sector is 48˚.

Sector center

indicator

PORT STBD

Sector of 48˚ set with

[SECTOR] control

Sector center angle

set with TILT control

Figure 3-8 Sector center

Automatic shifting of own ship position

Own ship position on the screen is automatically shifted either rightward or leftward according to

the direction of the sector center and display sector width.

The figure below shows the own ship position has been shifted rightward on the screen to

provide the wider view at the port side.

Sector center 0° to 60°: Own ship position shifted to port side

Sector center 66° to 114°: Own ship position shifted to center

Sector center 120° to 180°: Own ship position shifted starboard

Display sector

Sector center

Figure 3-9 How automatic shifting works

3-7

3.7 Selecting the Training Speed

The training speed selects how fast the transducer scans the display sector. Two choices are

available, 3° (normal speed, default setting) and 6° (high speed), and one may be selected with

the [FAST SCAN] key. Each time the key is pressed the display momentarily shows “NORM”

(normal speed) or “FAST” (high speed).

Normal: 60 transmissions for half circle in increments of 3°.

High: 30 transmissions for half circle in increments of 6°.

3.8 Finding Echo Position with the Cursor

The cursor measures horizontal range and depth. Operate the Omnipad to place the cursor

where desired. Cursor data appears at the top left-hand corner on the screen.

NAV

DATA

Cursor

Cursor data

+→ : Horizontal range

↓: Depth

Figure 3-10 Location of cursor position data

3-8

3.9 Event Marker

The event marker functions to mark important locations on the screen, and five event markers

may be inscribed. Each time the [EVENT] key is pressed the “latest event marker” (⊕) is

inscribed at the cursor location and all previously entered event markers are shown by the

“previous event marker” (+). When the capacity for event markers is reached the eldest event

marker is erased from the screen to make room for the latest.

Note 1: Event marker position can be output to external equipment and marked on the display

of the external equipment. Each press of the [EVENT] key outputs event marker

position. For details see TARGET L/L on page 5-11.

Note 2: Event markers cannot be inscribed from the vertical fan display when it is in the sub

window (Horizontal/vertical fan display). Inscribe the marker from the horizontal display

to show it in the vertical fan display.

3. Operate the Omnipad to place the cursor on the location desired for an event marker.

4. Press the [EVENT] key to inscribe the event marker. The event marker is inscribed on the

vertical fan display, as well as the horizontal and video plotter displays.

NAV

DATA

"Latest event marker"

"Previous event

marker"

To delete all event markers,

place cursor outside

display area and press the

[MENU] key.

Display area

Figure 3-11 How to inscribe, delete the event markers

3-9

3.9.1 Deleting all event markers

All event markers can be erased from the screen as follows:

4. Operate the Omnipad to place the cursor outside the display area.

5. Press the [EVENT] key to show the following dialog box. Do the next step within four

seconds, otherwise the dialog box will be erased.

DELETE EVENT MARK?

YESNO

6. Press to select YES and press the [MENU] key. All event markers are erased from the

screen.

3.10 Depth and Horizontal Range Markers

The depth and horizontal range markers function to measure the horizontal range and depth to

a desired echo.

Note: Depth and horizontal range markers cannot be inscribed from the vertical fan display

when it is in the sub window (Horizontal/vertical fan display). Inscribe the markers from

the horizontal display to show it in the vertical fan display.

1. Operate the Omnipad to place the cursor on the location desired.

2. Press the [R/B] key to display the depth and horizontal range markers. Horizontal range and

depth appear on the screen.

3. To erase the depth and horizontal range markers, press the [R/B] key again, or place the

cursor on the depth or horizontal range marker and press the [R/B] key.

NAV

DATA

105

Horizontal range

Depth

Horizontal range

marker

Depth marker

Figure 3-12 Depth and horizontal range markers

3-10

3.11 Adjusting the Picture

3.11.1 Displaying weak echoes clearly