Uniden America UT645 PORTABLE VHF PTT MARINE RADIO TRANSCEIVER User Manual Rev
Uniden America Corporation PORTABLE VHF PTT MARINE RADIO TRANSCEIVER Rev
Contents
- 1. User Manual 1
- 2. User Manual 3
- 3. User Manual Rev
User Manual Rev
RADIO VHF MARITIME FLOTTANTE
GUIDE D’UTILISATION
FLOATING VHF MARINE RADIO
OWNER’S MANUAL
MHS235
Lift the red cover. Press and hold the DISTRESS
button for three seconds. Your radio transmits
your boat’s location every few minutes until you
receive a response.
#
Enter User MMSI
Speak slowly - clearly - calmly.
For future reference, write your boat’s name & call sign here:
1. Make sure your radio is on.
2. Press the 16/9-TRI button to switch to Channel 16 (156.8 MHz). (If the corner of the
display does not show 16, press the 16/9-TRI button again until it does.)
3. Press the PUSH TO TALK button and say: “MAYDAY -- MAYDAY -- MAYDAY.”
4. Say “THIS IS {name of your boat (three times) and call sign/boat registration
number (once).”
5. Repeat “MAYDAY {name of your boat}” once.
6. Tell where you are: (what navigational aids or landmarks are near, or read the
latitude and longitude from your GPS).
7. State the nature of your distress (e.g. are you sinking, medical emergency, man
overboard, on fire, adrift, etc. ).
8. State the type of assistance you need (medical, towing, pumps, etc.).
9. Give number of persons aboard and conditions of any injured persons.
10. Estimate present seaworthiness of your ship (e.g. how immediate is the danger due
to flooding or fire or proximity to shore).
11. Briefly describe your ship, giving ship name (e.g. “Blue Duck is 32 foot cabin cruiser,
white hull, blue deck house”).
12. Say: “I WILL BE LISTENING ON CHANNEL 16.”
13. End message by saying “THIS IS {name or call sign of your boat}, OVER.”
14. Release the PUSH TO TALK button and listen.
Lift the red
cover and
press the red
DISTRESS
button
underneath.
Soulevez le couvercle noir. Maintenez Distress enfoncé
pendant trois secondes. Votre radio transmettra
l’emplacement de votre bateau toutes les quelques minutes
jusqu’à ce que vous receviez une réponse.
#
Enter User MMSI
Faire un appel de détresse
Parlez lentement – clairement – calmement.
Pour toute référence ultérieure, écrivez ci-dessous le nom et l’indicatif d’appel de votre bateau:
1. Vériez si votre radio est en marche.
2. Appuyez sur la touche 16/9-TRI an de commuter au canal 16 (156,8 MHz). (Si le canal
16 n’apparaît pas à l’afchage, appuyez de nouveau sur la touche 16/9-TRI jusqu’à ce
qu’il soit afché.)
3. Appuyez sur le bouton Push-to-Talk et dites:“MAYDAY -- MAYDAY -- MAYDAY”.
4. Donnez l’identité de votre navire en disant : “ICI {nom de votre bateau (trois fois) ou
indicatif d’appel et le numéro d’identication de votre bateau (une fois)}”.
5. Dites “MAYDAY {nom ou indicatif d’appel de votre bateau} une fois”.
6. Donnez votre position : (quels sont les points de repère ou aides à la navigation près
de vous ou lisez les coordonnées de longitude et de latitude apparaissant sur votre
dispositif GPS).
7. Révélez la nature de votre détresse (par exemple, nous sommes en train de couler,
urgence médicale, un homme à la mer, un incendie, nous sommes à la dérive, etc.
8. Révélez la nature de l’aide désirée (médicale, remorquage, essence, etc.)
9. Donnez le nombre de personnes à bord et les conditions des blessés, s’il y en a.
10. Donnez la condition de navigabilité actuelle de votre navire, tel que le degré de
l’urgence par rapport une inondation, et une incendie.
11. Donnez une brève description de votre navire en donnant le nom du bateau (par
exemple, “Blue Duck est un yacht de croisière de 32 pieds, avec une coque blanche et
un roufe bleu.).
12. Dites : “JE VAIS ÉCOUTER SUR LE CANAL 16”.
13. Terminez le message en disant “ICI {nom ou indicatif d’appel de votre bateau}, À VOUS”.
14. Relâchez le bouton Push-to-Talk du microphone et écoutez.
Soulevez le
couvercle noir
et appuyez sur
le bouton rouge
Distress en
dessous.
Introduction ................................. E-1
Features ........................................ E-1
Getting Started ............................ E-3
What’s included ............................. E-3
Parts of the MHS235 ..................... E-3
Front view ....................................E-3
Back view ....................................E-4
Charger ......................................... E-5
Reading the display ...................... E-5
Display icons and what
they mean ...................................E-5
How It Works ............................... E-6
Displays ........................................ E-6
Menus ........................................... E-6
MENU/CALL Menus ...................... E-6
Normal Menu ...............................E-6
Radio Setup
Menu........................E-7
Call
Menu .....................................E-7
DSC Setup
Menu .........................E-8
GPS
Menus .................................E-8
GPS Setup
Menu .........................E-8
Operation Modes .......................... E-9
Normal .........................................E-9
Scan ..........................................E-10
Weather ..................................... E-11
Setting Up the Hardware ......... E-12
Attaching the Antenna ................. E-12
Installing the Battery ................... E-12
Using Rechargeable Batteries .... E-12
Mounting the Charger ................. E-13
Charging the Battery ................... E-13
Important notes on charging
the battery .................................E-13
Setting Up Your Radio .............. E-13
Turning It On .............................. E-13
Entering the User MMSI .............. E-13
Setting It Up ................................ E-14
Acquiring GPS Location ............E-14
Changing the Volume ...............E-14
Setting the Squelch Level ..........E-14
Setting the UIC Channel
Mode (USA/CAN/INT) ............E-14
Setting Key Lock........................E-15
Setting WX Alert Mode ..............E-15
Setting FIPS Codes ...................E-15
Adjusting the Lamp ....................E-15
Adjust the LCD Contrast ............E-15
Setting the Air or Water
Temperature Measurement ....E-15
Turning the Key Beep
On and Off .............................E-16
Operating the Radio ................... E-16
Making a Transmission ..............E-16
Changing the transmission
level........................................E-16
Changing the Channel ...............E-17
Saving the Channel into
Memory ..................................E-17
Using the Strobe/Flashlight .......E-17
Digital Selective Calling
Features ................................E-17
What is DSC? ............................ E-17
Advanced DSC features ............ E-17
MMSI Numbers ........................... E-18
Entering MMSI numbers ...........E-18
Entering Your User MMSI
Number .................................E-19
Entering a group MMSI
number ...................................E-19
Entering an individual MMSI
number ...................................E-19
Using the Directory ..................... E-20
Making DSC Calls ....................... E-20
E-1Uniden MHS235 Radio Owner’s Manual
Calling a single station
(Individual Call) .....................E-22
Calling a particular group
of stations (Group Call) ..........E-22
Calling all stations
(All-Ships Call) .......................E-22
Making an automatic distress call E-23
Canceling an automatic
distress call ...........................E-23
Receiving a DSC call .................. E-23
Receive log ................................E-23
Returning a call from the
Receive Log ..........................E-24
Test Calls .................................... E-24
Making Test Calls (Test) ...........E-24
Receiving Test Call Setup ..........E-25
Position Request and Reply ........ E-26
Enabling Automatic
Position Reply ........................E-26
POS Request.............................E-26
Position Reply............................E-27
Position Send ...........................E-27
Putting the radio into standby .... E-27
Disabling automatic channel
switching .................................. E-28
GPS Features ............................ E-28
GPS Operation Overview ............ E-28
MOB
Menu .................................. E-28
Favorite
Menu.............................. E-28
NMEA Features ......................... E-29
ADDITIONAL FEATURES ......... E-30
Renaming Channels .................. E-30
Maintenance and
Troubleshooting ................. E-31
Common Questions .................... E-31
Specications ........................... E-31
Channels and
Frequencies (MHz) ................... E-32
US channel frequencies
and names .............................E-32
Canadian channel frequencies
and names .............................E-34
International channel
frequencies and names..........E-35
Weather channel
frequencies and names.........E-37
Regulations and
Safety Warnings .................... E-38
Maritime Radio Services
Operation ................................. E-38
Basic Radio Guidelines ............... E-38
Three Year Limited
Warranty ................................. E-39
Your radio provides the following key features:
xSubmersible design. Complies with oating JIS8/IPX8 water-resistant standards,
which means the radio can be submerged in 1.5 meters of water for 1 hour without
damage.
#
The radio will only meet this rating if fully assembled and all rubber seals and
bungs are well maintained and correctly tted. This means that the speaker
microphone bung is inserted, and the battery pack (or case) and antenna are
attached and securely fastened.
E-2 Uniden MHS235 Radio Owner’s Manual
After your radio is submerged in water, the sound might be distorted. This
is because there is still water remaining in and around the speaker and
microphone. Just shake the radio to clear excess water, and the sound should
return to normal.
If your radio is exposured to salt water, clean it thoroughly with fresh water
and dry it before turning it on.
The charger is not waterproof.
xMemory Scan mode. Lets you save channels to memory and monitor them in quick
succession.
xTransmitter power level select. Lets you boost the transmitter power from 1W to 2.5
or 6W for added transmission distance.
xBattery level display and low battery alert.
xDual and Triple Watch operation. These different watch modes let you monitor up to
two Coast Guard Distress/Hailing channels and one weather channel along with one
regular marine channel.
xAll marine VHF channels for the U.S., Canada, and international waters
xEmergency 16/09 Channel monitoring. Set unit to scan one or both of these
emergency channels regularly within normal scanning cycles.
xClass D second receiver is dedicated to monitoring the DSC watch channel 70 to
ensure that no incoming messages are missed.
xNational Oceanic and Atmospheric Administration (NOAA) Weather Channel
watch. Sounds a warning tone when a hazard alert is issued.
xSOS Strobe/Flashlight. A high intensity strobe LED can be set to blink an SOS
pattern or to be steady on.
xTemperature. The thermal sensor lets you measure both water and air temperature.
You can display temperature in Farenheit or Celsius.
xKey Lock. Locks keys to prevent accidentally changing channels or entering data.
xSelectable Backlight Timer. Lets you select the length of time the backlight will be
on.
xReversable LCD. You can change the display from light characters on dark
background to dark characters on light background.
xDSC. Lets you call other stations or groups using their unique identication code. This
radio complies with International Class D DSC standards for Handheld GPS/VHF
marine transceivers.
xGPS (Favorite Position mode). Lets you to save your current position as well as
manually enter other positions.You can save positions into a directory to return to them
as desired.
xNMEA input/output. Lets you connect to a chartplotter and determine what NMEA
data you want to receive.
x9 weather channels available for monitoring.
xBoost. Allows you to instantly transmit at a full 6 Watts.
xMOB (Man Overboard). Lets you lock onto the current position when a Man
Overboard situation occurs.
xCompass Display. Lets you determine the way you want the radio to display your
course - by showing your course and direction or by showing location on an north-
south-east-west display. Automatically auto-plots to a received DSC distress call.
E-3Uniden MHS235 Radio Owner’s Manual
If any pieces are missing or damaged, contact Uniden Customer Service (see back cover
for contact information). For information on available accessories, visit
www.uniden.com.
Front view
Button Press to... Press and hold to...
Push -to-Talk N/A Transmit on a current TX power.
Boost N/A Boost TX to 1.5w (NiMH rechargeable
batteries) or 6W (TX power).
16/9-Tri
1st press: Go to CH 16.
2nd press: Go to CH 9.
3rd press: Go back to the starting
channel.
Turn Triple or Dual Watch mode on
and off.
▲ / ▼
Scroll up or down through one
channel and data at a time when in
Marine or Menu mode.
Quickly scroll up or down through
channels and data when in Marine or
Menu mode.
Antenna
MHS235 Radio
Charging Cradle
AC Adapter DC Adapter
Accessory Battery
Tray
(batteries not
included)
Lithium Ion
Rechargeable Battery
Not shown:
External speaker/
microphone
Belt Clip
Wrist Strap
Mounting Hardware
Antenna
CLR/SCAN
button
16/9-Tri
(16/9- triple
watch) button
Power
Microphone/Speaker
connection
Push-to-talk
button
Speaker
Distress
button
VOL/SQ
button
WX/SOS
button
STROBE/FLASHLIGHT
LED
MENU/CALL
button
GPS/MEM
button
Note: Thermal sensor on back.
DISP/ENTER-
H/M/L button
Microphone
UP/DOWN
buttons
LCD
Display
BOOST
button
E-4 Uniden MHS235 Radio Owner’s Manual
Button Press to... Press and hold to...
WX/SOS
◄
-Turn Weather mode on and off.
-Return to last marine channel.
-Move cursor to the left while in
Menu mode.
-Return to previous menu.
Turn on the strobe SOS signal. Press
and hold again to change to the
ashlight. Press and hold again to turn
off the LED.
MENU/CALL Access the Normal menu. Access DSC call menu.
DISP/ENT H/M/L/
-Scroll through the 5 available
information display menus.
-Select menu items.
-Return to normal Marine mode
when Marine channel list is
displayed.
Change the TX power between LO
(1W), MID (2.5W), and 6W (HI).
CLR/SCAN Exit menu screens. Enter or exit Scan mode.
GPS/MEM
►
-Enter or exit GPS menu.
-Move cursor to the right while in
Menu mode.
Store or delete the current channel into
memory.
VOL/SQ Enter or exit Volume Setting mode. Enter or exit the Squelch setting mode.
Power Turn MHS235 on and off.
Distress Sends out emergency signal.
Back view
Belt clipBatteryBattery charging
contacts
Battery
latch
E-5Uniden MHS235 Radio Owner’s Manual
The LCD display shows different information
depending on what you are doing. Not all icons
display on every screen. This dummy screen
displays many of the possible icons. The table
below shows possible icons and what they
mean.
Display icons and what they mean
Icon What it means
The keys are locked.
Weather Alert Watch is turned on.
The battery is fully charged, mostly charged, half charged, mostly empty, or
completely empty.
BRG Bearing from boat’s position to destination from Favorite’s list.
COG Current course (Course over Ground). COG displays when Favorite mode or
Compass mode is active, or when a DSC distress call is received.
DIST Distance from boat’s position to destination.
LOW / MID / HI The transmitter power is set to LOW (1W), MID (2.5W), or HI (6W).
USA / CAN / INT Indicates Channel mode: US, CANadian, or INTernational channels.
MEM The current channel is saved in memory.
˚F/ ˚C Temperature display is active (Farenheit or Centigrade).
Valid GPS data received from the GPS receiver.
No valid GPS data received from the GPS receiver.
Charging
contacts
CHARGE LED
Screw holes
for mounting
Power jack
[cigarette (DC) or
wall (AC) plug]
Charging
latches
NMEA contacts
A
Weather Alert
Watch is on
Current channel
number
This channel is
in Memory
Battery
status
Channel name
GPS data
Keylock is
active
HI
MEM
USA
87˚F
11:00AM
35˚ 40.610 N
139˚ 46.564 E
COMMERCIAL
Time
Channel
mode
Ambient
temperature Transmit
power level
E-6 Uniden MHS235 Radio Owner’s Manual
Icon What it means
CX
OFF Automatic Channel Switch when receiving a DSC call is off.
N
E
S
WA
Compass icon shows when a DSC distress call has been received, a Favorite
location has been selected, or the Compass main display screen has been
selected.
Position mark. Indicates the target point.
Press the DISP/ENT H/M/L key to display the following screens:
xMarine mode
xPosition mode
xFavorite mode
xCompass mode
xTemperature mode
xGPS Status mode
The last screen displayed will display again the next time the unit is powered up.
Various menus let you establish guidelines and parameters for sending and receiving calls.
Menus also let you set your radio’s characteristics such as brightness, Code selection, and
contrast.
The MENU/CALL button accesses menus that let you set the way your radio operates. The
GPS/MEM button lets you set up your GPS features and save GPS locations to a favorites
list to use again later.
MENU/CALL
You can set up the radio’s physical displays and operation modes (
Normal
menu) and how
you want to receive and send various types of calls (
Call
menu), The Normal menu provides
access to the Radio Setup submenu and the Call menu provides access to the DSC Setup
submenu.
Normal Menu
Press MENU/CALL to display the following
Normal
menu options:
Menu Option What it does
WX Alert Enables the WX Alert fuction.
FIPS Codes 30 FIPS codes for use with S.A.M.E. to ensure only the local alerts are heard.
E-7Uniden MHS235 Radio Owner’s Manual
Menu Option What it does
Dual/TriWatch Sets the radio for Dual Watch or Triple Watch.
USA/CAN/INT Selects which channels and frequencies your radio will communicate with
(USA, Canadian, or International)
Channel Name 12 characters that allow custom channel names to be used.
Key Lock Locks the keypad so the selected channel is not accidentally changed.
Radio Setup Select this option from the
Normal
menu to set up the radio itself.
Radio Setup
Menu
Use this option from the
Normal
menu to set up physical requirements for the radio. The
menus options are:
Menu Option What it does
Lamp Adjust Set the backlight always off, timer, or always on.
Contrast/RVS. You can adjust the brightness of the screen contrast higher or lower through 10
levels. Once you get to the bottom limit of the contrast, selecting it again reverses
the contrasts.
Temperature Set the air and water temperature reading to display in degrees Farenheit or
Celcius.
Key Beep Set unit to sound a beep tone with each key press (ON/OFF).
Call
Menu
Press and hold MENU/CALL to
set the technical requirements for DSC function operations
through the
Call
menus. The menu options are:
Menu Option What it does
Individual Sends an individual call to an individual station.
Group Sends a call to a group.
All Ships Sends
URGENCY
or
SAFETY
message to all ships.
POS Request Requests the position of an individual vessel.
Position Send Transmits your position to an individual vessel.
Test Sends a test call.
Standby Places the radio in an unattended mode.
Receive Log Displays a list of all received calls to the radio. The MHS235 stores log data for 10
distress calls and 50 other calls.
DSC Setup Allows the user to set up Digital Selective Calling (DSC) service.
E-8 Uniden MHS235 Radio Owner’s Manual
DSC Setup
Menu
This menu sets up DSC parameters.. The menu options are:
Menu Option What it does
Directory Displays a list of up to 20 vessel IDs. Provides a means of entering a new vessel ID.
Auto CH SW Select ON or OFF to enable/disable Automatic Channel Switch. Auto CH SW lets
you automatically change channels if an Urgent or Safety DSC call comes in.
POS Reply Lets you elect to respond automatically or manually.
Test Reply Lets you elect to respond to a test request automatically or manually.
Group MMSI Allows you to program the 9-digit Group MMSI setting.
User MMSI Allows you to program the 9-digit User MMSI setting.
GPS
Menus
Press GPS/MEM to congure the GPS module through the
GPS
menu. See page E-28 for
details.
Menu Option What it does
MOB (Man
Overboard)
Instantly saves your current position to the top of the Favorites list.
Favorite Allows you to select a GOTO location and add new GOTO coordinates and name
them.
GPS Setup Sets up how the GPS will operate.
GPS Setup
Menu
This menu sets up GPS module parameters.. The menu options are:
Menu Option What it does
Unit Power Allows you to turn the GPS module on or off to conserve battery life.
Power save Turns the Battery Save feature on or off.
Time Adjust Allows you to adjust to local time.
Daylight Save Allows you to turn Daylight Davings Time on or off.
SOG Unit Lets you set the Speed Over Ground measurement in knots, miles per hour, or
kilometers per hour.
Compass Set Compass display setting to either Course-Up or North Up.
NMEA Out Allows you to select any or all of the following NMEA sentences for output: GGA,
GSA, GSV, and RMC. The DSC and DSE sentences are always sent.
E-9Uniden MHS235 Radio Owner’s Manual
Your radio has three main operation modes: Normal, Scan, and Weather.
Mode What it does Use it when you want to... To turn it on/off
Normal Monitors a single marine channel and
lets you talk on that channel.
Monitor a channel or talk to
another radio. (default mode)
Scan Monitors all the channels you save
into memory.
Check a small group of regularly-
used channels for trafc.
Press and hold CLR/
SCAN for 2 sec.
Weather Monitors the selected NOAA weather
channel.
Hear the current or forecasted
weather. Press WX/SOS
In addition to the three operation modes, your radio provides four different watch modes
which you can activate during any operation mode. In the watch modes, the radio briey
checks for activity on a specic channel, then returns to its previous operation.
Watch mode What it does To turn it on/off
Weather Alert
Watch
Checks the last-used weather channel for
hazard alerts every few seconds.
Select
on or off
from the
Normal/WX Alert
menu.
Dual Watch Checks emergency channel 16 for activity
every few seconds.
Select dual watch from the
Normal/Dual/
TriWatch
menu and press and hold 16/9-Tri
for 2 seconds.
Triple Watch Checks emergency channels 16 and 9 for
activity every few seconds.
Select triple watch from the
Normal/Dual/
TriWatch
menu and press and hold 16/9-Tri
for 2 seconds.
#
Normal
xTo transmit, remove the radio from the charger, then press and hold Push to Talk.
Release the button when you are nished talking.
xFor the best sound quality, hold the microphone about two inches from your mouth
while you’re talking.
xPress Channel Up to move up one channel at a time. Press and hold the button to
scroll quickly up the channels.
xPress Channel Down to move down one channel at a time. Press and hold the button
to scroll quickly down the channels.
xTo change the transmit power, press and hold DISP/ENT H/M/L. The transmit power
cycles through LOW (1W), MID (2.5W), and HI (6W), then back to LOW again. Press
BOOST on the left side of the radio to boost the transmit power to 6W (Lithium Ion
battery) or to 1.5W (NiMH batteries).
#
E-10 Uniden MHS235 Radio Owner’s Manual
Normal Mode with Weather Alert Watch
If you activate Weather Alert Watch while
operating in Normal mode, the radio checks the most
recently used weather channel every seven
seconds. If it detects a weather or other hazard alert,
it will switch to that weather channel. (If you are actively
transmitting, the radio waits until you nish your transmission
before checking the weather channel.)
Normal Mode with Triple Watch or Dual Watch
If you activate Triple Watch while operating in Normal mode, the radio checks channels 16
and 9 every few seconds; with Dual Watch turned on, the radio only checks channel 16.
The radio will not check channels 16 or 9 while you are actively transmitting; it waits until
your transmission is nished and then checks the channels.
Scan
You can save any channel (except Weather channels) into memory and then use Scan
mode to monitor those channels from lowest to highest. If the radio detects a signal on a
channel, it stays on that channel as long as the signal is received; when the signal stops,
the radio continues scanning.
Using the Radio in Scan Mode
xTo activate Scan mode, press and hold CLR/SCAN. The radio scans channels in
memory.
xYou must have at least two channels in memory to start a scan.
xYou cannot transmit while in Scan mode.
xTo save a channel into memory, select the channel, then press and hold the GPS/
MEM button. The MEM icon displays whenever you tune to that channel.
xTo remove a channel from memory, set the radio to that channel, then press and hold
the GPS/MEM button. The MEM icon no longer displays.
xWhen the radio stays on a channel, press Channel Up to leave that channel and
resume scanning.
xTo end the scan, press and hold the CLR/SCAN button again; the radio remains on the
last scanned channel. You can also press WX/SOS to change to Weather mode.
Scan Mode with Weather Alert Watch
When you activate Weather Alert Watch through the Normal menu while in Scan mode, the
radio checks the most recently-used weather channel every seven seconds, then continues
scanning the next channel in memory:
wx
Every 7 seconds,
the radio checks
the last-used
weather channel.
WX Alert
Watch on
Monitoring Channel 25
11
1008 1312 14 17
15
The radio scans about
5 channels in 0.3 seconds.
When it detects a signal, the radio stays
on the channel until you press the
Channel Up button or the signal stops. Resume
scan
E-11Uniden MHS235 Radio Owner’s Manual
Scan Mode with Triple Watch or Dual Watch
If you activate Triple Watch (press and hold 16/9 TRI) while operating in Scan mode, the
radio checks channels 16 and 9 every two seconds, then goes on to scan the next channel
in memory. With Dual Watch turned on, the radio only checks channel 16:
Press 16/9 TRI again to cancel Triple Watch mode.
Both Weather Alert and Triple/Dual Watch in Scan mode
You can activate Weather Alert Watch and Triple/Dual Watch at the same time. Press and
hold 16/9 TRI to turn on Triple Watch; turn on WX Alert through the Normal menu. The radio
performs both checks at their scheduled time:
Weather
The NOAA weather channels now cooperate with the FCC to alert you of other hazards
besides weather (child abduction alerts, nuclear, biological, etc.). In Weather mode, the
radio monitors one of the 9 NOAA weather channels. If a weather alert signal is received in
Weather Alert mode, the radio sounds an alert tone and the display blinks.
Using the Radio in Weather Mode
xYou cannot transmit while in Weather mode.
xTo enter Weather mode, press WX/SOS.
xTo turn off the radio’s alert tone, press any button.
xTo cancel Weather mode and return to the previous marine channel, press WX/SOS
again.
Weather Mode with Weather Alert Watch
If you activate Weather Alert Watch through the Normal menu while operating in Weather
mode, it operates as a type of “sleep mode:” the radio stays on the weather channel and
Every 7 seconds, the radio
checks the last-used
weather channel, then
scans the next channel. wx
WX Alert
Watch on
Memory Channel Scan
08 252417151413121110 20
09
16
Every 2 seconds, the
radio checks channels
16 & 9, then scans
the next channel.
Triple
Watch on
Memory Channel Scan
08 252417151413121110 20
Every 2 seconds, the
radio checks channels
16 & 9, then scans
the next channel.
Triple
Watch on
Every 7 seconds, the radio
checks the last-used
weather channel, then
scans the next channel. wx
WX Alert
Watch on
Memory Channel Scan
08 252417151413121110 20
09
16
E-12 Uniden MHS235 Radio Owner’s Manual
mutes the speaker. If an alert is detected, the radio sounds an alert tone and turns the
speaker back on. This mode is very useful when you are anchoring for the night but want to
keep informed of hazards.
Weather Mode with Triple Watch or Dual Watch
If you activate Triple Watch (press and hold 16/9 TRI)
while operating in Weather mode, the radio checks
channels 16 and 9 every few seconds; with Dual
Watch turned on, the radio only checks channel 16.
The antenna detaches from the radio for easy shipping or storage. To attach the antenna to
your radio, screw it tightly onto the anchor post at the top of the radio.
Your radio comes with a rechargeable Lithium Ion battery; for shipping safety, the battery is
not installed at the factory. An empty accessory battery tray is installed as a placeholder.
1. Insert the hook on the battery into the notch at the top of the battery compartment.
#
2. Lower the battery until it rests at in the compartment.
3. Bring the battery latch up and snap it into place.
The radio also comes with an accessory battery tray that holds four AAA-type NiMH
rechargeable batteries (not included). You can use rechargeable batteries as a backup
when the Li-Ion battery (Uniden BT-895 or equivalent, 1.2V 900mAh) gets low and needs
to be charged.
#rechargeable
Follow these steps to use the accessory battery tray:
1. Hold the lower part of the tray in one hand with the three battery contacts facing
down. Use your thumb to hold the notch on the lower part of the tray.
2. With your other hand, grip the upper part of the tray and lift the cover open.
3. Align the batteries’ positive and negative terminals with the drawing on the case and
snap each battery into place.
4. Insert the two hooks on the lower part of the tray into the notches on the cover; close
the cover. (The cover ts snugly but you should not have to force it closed.)
5. Install the accessory battery tray in your radio just as you do the Li-Ion battery (see
page E-12).
Every 2 seconds, the radio checks
channel 16, then channel 9
with Triple Watch on
09
16 09
16 09
16
Monitoring Weather Channel WX08
E-13Uniden MHS235 Radio Owner’s Manual
You can mount the charger on any at surface.
1. Use the two holes at the base of the charger as a template to mark the drill holes.
2. Using a 1/8-inch (or 3 mm) drill bit, drill two holes 1/2 inch (13mm) deep.
3. Use the provided screws to attach the charger to the surface.
#
Your radio includes a charger and a rechargeable battery pack.
Place your radio in the charger with the display facing forward.
Make sure that the CHARGE LED on the charger turns orange.
The battery is fully charged when the LED turns green.
xUse only the battery and charger supplied with this
radio. Using a different charger or battery can damage
the radio and create a risk of re or shock.
xThe charger is not waterproof. If the charger falls into the water, unplug it before
attempting to remove it from the water. After you remove the charger from the
water, please contact Customer Service (see the back cover page for contact
information).
xWipe off dirt or shake water from your radio before placing in the charger if your
radio gets dirty or wet.
Important notes on charging the baery
xCharge the battery fully before using the radio.
xDon’t use the charger when the ambient temperature is below 0° C (32° F) or above
45° C (113° F).
xIf the radio is powered down, the battery can charge in about seven hours. (If the radio
is powered on, the battery takes longer to charge.)
Press the POWER button for at least two seconds to turn the radio on. Press and hold it to
turn the unit off.
When you power up your radio for the rst time, it displays
MMSI Not Entered
and then
displays a Marine mode screen. User MMSI numbers are unique and cannot be entered
more than once. See page E-18 for general information about MMSI numbers and how to get
E-14 Uniden MHS235 Radio Owner’s Manual
your specic User MMSI number and enter it.
#
Even though you can change your radio’s settings at any time, you will probably want to
establish initial settings when you have turned it on for the rst time. You will adjust some
of these settings on an as-needed basis, but some settings might only be set once and not
need adjustment at all.
Acquiring GPS Locaon
The MHS235 automatically acquires your current GPS location when it is turned on. Turn
on the radio and point the antenna towards the sky. It will triangulate your location and save
it.
#
Changing the Volume
To change the speaker volume, press VOL/SQ to enter Volume Setting mode.The
VOL
and
SQ
icons display at the bottom of the screen (
VOL
blinks). Press Channel Up or Channel
Down to increase or decrease the volume levels (0 - 15).
Seng the Squelch Level
The MHS235 recognizes signals as transmissions if they exceed a signal strength
threshold. Adjusting the squelch sets this threshold level. Increasing squelch requires a
signal to be stronger to be seen as a transmission. If you set the squelch too high, you
will risk not receiving transmissions that are lower than that threshold. Reducing the
squelch allows weaker signals to be accepted. However, if you lower the squelch too
much, you will hear white noise all the time.
The squelch feature reduces static on the speaker by ltering out any background
channel noise. At the lowest squelch level, the speaker plays all signals, including any
channel noise. Setting the squelch level higher lters out noise and lets only actual radio
transmissions through.
While listening to a channel, press and hold VOL/SQ to enter Squelch Setting mode. The
VOL
and
SQ
icons display at the bottom of the screen (
SQ
blinks). Press Channel Up or
Channel Down to increase or decrease the squelch levels (0 - 15).
#
Seng the UIC Channel Mode (USA/CAN/INT)
You can select marine channels for the USA, Canada, or International waters.
1. Press MENU/CALL. The
Normal
menu displays.
2. Select
USA/CAN/INT
and press DISP/ENT H/M/L. The
USA/CAN/INT
screen displays.
3. Select the mode you want and press DISP/ENT H/M/L.
E-15Uniden MHS235 Radio Owner’s Manual
Seng Key Lock
You can lock the keypad through the
Normal
menu. The
icon displays when Keylock is
on. Unlock it by pressing and holding MENU/CALL for 2 seconds.
Seng WX Alert Mode
From the
Normal
menu, select
WX Alert
mode to turn this mode ON for the radio to monitor
weather channels and alert you to any broadcast weather alerts or notications. Turn
WX
Alert
OFF through the
Normal
menu as well.
Seng FIPS Codes
FIPS codes identify counties in the United States. FIPS codes allow you to receive only the
SAME alert occurring in a specic area. You can enter a maximum of 30 FIPS codes.
#
1. Press MENU/CALL to bring up the
Normal
menu.
2. Select
FIPS Codes
.
3.
[New]
and a list of previously entered FIPS codes display. Enter a new FIPS code or
select from the list of existing FIPS codes to edit or delete.
Adjusng the Lamp
The backlight LCD function can be set to automatically dim after a set time.
1. Press MENU/CALL and select R
adio Setup/Lamp Adjust
.
2. Lamp Adjust options are
Always Off, Timer
, or
Always On
.
3. If you select
Always On
, the next screen lets you choose between
Green
and
Orange
.
If you select timer, the options are
x10 sec
x30 sec
x1 min
x3 min
x5 min
Adjust the LCD Contrast
This feature lets you adjust the LCD’s contrast level. It also permits you to reverse the
contrast completely. You can choose to have dark characters on a light background or light
characters on a dark background.
1. Press MENU/CALL and select R
adio Setup/Contrast/RVS
; press Channel Up or
Channel Down to adjust the contrast.
2. Pressing Channel Down to turn the contrast all the way off will reverse the
background/letters.
Seng the Air or WaterTemperature Measurement
You can set the temperature to display in Celsius or Farenheit.
1. Press MENU/CALL and select select R
adio Setup/Temperature
.
2. Temperature options are °
C (Celsius) or °F (Farenheit)
.
E-16 Uniden MHS235 Radio Owner’s Manual
#
Turning the Key Beep On and O
Key beep is the tone that sounds when you press a key or a button. Press MENU/CALL to
bring up the
Normal
menu. Select R
adio Setup/Key Beep
. Press Channel Up or Channel
Down to turn the key beep on or off.
Making a Transmission
Select the channel you want to transmit on, then press and hold the Push to Talk button.
Release the Push to Talk button when you’re nished talking to let the other party respond.
xTo prevent stuck microphone problems or situations where the Push to Talk
button is pushed accidentally, the radio limits your talk time to 5 minutes in a single
transmission.
xFor the best sound quality, hold the microphone about two inches away from your
mouth.
xSee page E-23 for a list of receive-only channels.
Changing the transmission level
In most situations, 1W transmission power is all you need. If you nd yourself far away
from other stations and have trouble getting a response, you may need to increase the
transmission power. If your radio is powered by a Li-Ion battery, you can press and hold the
BOOST button to transmit at 6W; however, NiMH battery power boost is limited to 1.5W.
To increase the transmission power in increments:
1. Select the channel you want to transmit on.
2. Press and hold DISP/ENT H/M/L to switch to the next transmission power level (for
example, from 1W to 2.5W, from 2.5W to 6W, or from 6W back to 1W).
Current power
level (W)
Press and hold DISP/ENT
H/M/L to change to... (W) Displays
1 2.5 MID
2.5 6 6W
6 1 LO
3. The display shows the new transmission power as
6W,
MID
, or
LOW
. The transmit
power remains at the new setting until you change it again.
#
Some channels (for example, channels 13 and 67) limit the transmission power to 1W.
When you tune to a limited-power channel, the radio automatically switches to 1W. See
page E-33 for a list of power-restricted channels.
E-17Uniden MHS235 Radio Owner’s Manual
Changing the Channel
Press the Channel Up and Channel Down buttons briey to scroll through the channels
one channel at a time. Press and hold the Channel Up or Channel Down buttons to
quickly scroll through the channels.
Saving the Channel into Memory
Press and hold GPS/MEM.
MEM
displays on the screen to indicate that that channel is now
stored in memory. Press and hold GPS/MEM again to remove the channel from memory.
Using the Strobe/Flashlight
You can use this radio in an emergency. If you press and hold WX/SOS, the radio turns on
the high-intensity LED strobe on your radio. The LED ashes “S O S” in international Morse
Code.
#
1. Press and hold WX/SOS. The LED lights in the SOS Morse Code pattern.
2. Press and hold WX/SOS again. The LED stays on.
3. Press and hold WX/SOS again. The LED goes off.
Digital Selective Calling (DSC) is a standard that allows you to call other stations using
their unique identication code (the Maritime Mobile Service Identity or MMSI number), just
like you would call a phone number. To call another station, just enter that station’s MMSI
number and choose the voice channel you want to talk on. The radio uses channel 70 to
transmit your MMSI number to the other station along with the voice channel you requested.
If the other station accepts your call, both radios automatically switch to the requested voice
channel so you can talk to the other station.
DSC provides a system for automated distress calls. At the touch of a button, the radio can
transmit your MMSI number, the nature of your distress, and your current position based on
data from your GPS receiver. The radio repeats the distress call every few minutes until it
receives an acknowledgement.
The DSC standard dedicates a VHF channel—channel 70—to digital transmissions only.
Since digital transmissions require less bandwidth voice transmissions, channel 70 avoids
the problems of busy voice channels.
Your radio supports the following DSC features:
Feature Menu Item Function
Individual Call Individual Contact another vessel from your directory.
Group Call Group Contact all vessels that share your group MMSI code.
E-18 Uniden MHS235 Radio Owner’s Manual
Feature Menu Item Function
All Ships Call All Ships Broadcast to all vessels within range (used for Safety or Urgency
messages).
Position Request POS Request Request the current location of another vessel.
Position Send Position Send Transmit your current location to another vessel.
Test Call Test Make sure your radio is working and congured correctly.
Standby Mode Standby Automatically respond to all DSC calls with “Unavailable” status.
Receive Log Receive Log Displays last 10 distress calls and last 50 general calls the radio
received.
DSC Setup DSC Setup Accesses DSC menus.
-Directory
-Auto CH SW
-POS Reply
-Test Reply
-Group MMSI
-User MMSI
In order to use DSC features, you must be assigned a User MMSI number and program
that number into your radio. There are two kinds of MMSI numbers: individual numbers
for use by single boats and group numbers for use by eets, boating organizations, event
coordinators, etc.
You can get more information on MMSI numbers at these resources:
xThe dealer where you purchased the radio
xRecreational boaters can obtain an MMSI number from the Boat Owner’s Association
of the U.S. (http://www.boatus.com/mmsi/ or call 800-536-1536) or Sea Tow Services
International (http://seatow.com/boating_safety/mmsi.asp)
xCommercial boaters need a ship station license to get an MMSI number. For more
information, visit the Federal Communications Commission (FCC) website at http://
wireless.fcc.gov/marine/ fctsht14.html.
Entering MMSI numbers
Use the Channel Up and Channel Down keys to scroll through numbers (and letters when
entering names). When you see the number/letter you want, press the right arrow (GPS/
MEM) to move the cursor to the next space. Press the left arrow (WX/SOS) to back up.
When using the Channel Up and Channel Down keys to enter a name, the alphabetic and
numeric characters display in the following order:
xCapital letters (A through Z)
xLower-case letters (a through z)
xPunctuation (/ ‘ + -)
xNumbers (0 through 9)
xOne blank space
E-19Uniden MHS235 Radio Owner’s Manual
Entering Your User MMSI Number
#
When you power up your radio for the rst time, it displays
MMSI Not Entered
and then
displays a Marine mode screen.
1. Press and hold MENU/CALL; the
Enter User MMSI
screen displays.
2. Press DISP/ENT H/M/L. The
User MMSI
screen displays.
3. Enter the MMSI number as described previously to scroll through the numbers.
When the ninth digit is entered, the radio asks if you want to save the number and
conrm it. Press DISP/ENT H/M/L to save it.
4. Before saving the number, the radio displays the message
Conrm number! User
MMSI data is Permanent!
At this point you can edit the number (press MENU/CALL),
save the number (press DISP/ENT H/M/L), or return to the Marine mode screen
(press CLR/SCAN),
Entering a group MMSI number
You can change the group MMSI number as often as you want. The rst digit of a group
MMSI is xed at “0.” Follow the steps below to enter a group MMSI number into the radio:
1. Press and hold MENU/CALL to display the
Call
Menu.
2. Select
DSC Setup/Group MMSI
and press DISP/ENT H/M/L. The
Group MMSI
screen
displays.
3. Group MMSI numbers always start with a 0, so that digit is already entered for you.
Enter the MMSI number as described previously. When the ninth digit is correct,
press DISP/ENT H/M/L. The radio asks you to conrm.
4. To save this MMSI number, press DISP/ENT H/M/L. To cancel this MMSI number,
press CLR/SCAN.
Entering an individual MMSI number
Follow the steps below to enter individual MMSIs and names of other vessels into the
directory:
1. Press and hold MENU/CALL to display the
Call
Menu.
0________
Use the up and down arrows
to adjust each of the eight
digits in turn.
16
Group MMSI
Back
[MENU]
Exit
[CLR]
Save
[ENT]
USA
Press and hold
Group MMSI
DSC Setup
0________
Use the up and down arrows
to adjust each of the nine
digits in turn.
16
MMSI
Back
[MENU]
Exit
[CLR]
Save
[ENT]
Name USA
DSC Setup
Press and hold
[New]
Directory
Call Menu
E-20 Uniden MHS235 Radio Owner’s Manual
2. Scroll to
DSC Setup
and press DISP/ENT H/M/L.The
DSC Setup
menu displays.
3. Scroll to
Directory
and press DISP/ENT H/M/L. The
Directory
menu displays.
4. Select
[New]
and press DISP/ENT H/M/L.
5. Enter the MMSI number as described previously. When the ninth digit is correct,
press DISP/ENT H/M/L and the cursor moves to the
Name
eld.
6. Enter the name as described previously. When you have entered the name, press
DISP/ENT H/M/L.
7. The radio displays the new MMSI number and name and asks you to conrm. To
save this MMSI number and name, press DISP/ENT H/M/L To cancel this MMSI
number, press CLR/SCAN.
The directory lets you store up to 20 MMSI numbers of other stations so you can call them
quickly. From the directory, you can edit or delete MMSI numbers.
Follow the steps below to edit the MMSI numbers in your directory:
1. Press and hold MENU/CALL to display the
Call
menu.
2. Scroll to
DSC Setup
and press DISP/ENT H/M/L.The
DSC Setup
menu displays.
3. Scroll to
Directory
and press DISP/ENT H/M/L.The
Directory
screen displays. This
screen lets you add a new MMSI or edit/delete an existing MMSI.
4. To enter a new MMSI, select [NEW] and follow the procedures for entering an
individual MMSI number.
5. To edit an existing MMSI number/name, select the entry and press DISP/ENT H/M/L.
6. Select
Edit
and press DISP/ENT H/M/L. The MMSI number and name display. Edit
accordingly and press DISP/ENT H/M/L when complete. A conrmation screen
displays.
7. Press DISP/ENT H/M/L to accept the edits or CLR/SCAN to cancel. The radio
returns to the
DSC Directory
Edit
screen.
8. To delete the directory entry, select
Delete
.
When you are satised with the directory list, press CLR/SCAN to close the menu
screen.
There are essentially four different types of DSC voice calls:
Back
[MENU]
Exit
[CLR]
Save
[ENT]
USA
MMSI
123456789
Name
Uniden
16
Directory
Press and hold
Select an
entry
Edit
Call Menu/
DSC Setup
E-21Uniden MHS235 Radio Owner’s Manual
Call type What it does When to use it
Distress Alerts all stations that you need assistance and
sends them your current position.
In an emergency only.
Individual Calls a single station using the User MMSI. When you want to talk to another station.
Group Calls all the stations that have the same Group
MMSI as yours.
Any time you want to talk with the whole
group you are traveling with at the
same time.
All Ships Calls all stations within range of your radio. Safety warnings (e.g., debris in the
water) or any urgent situation.
Suppose you are coordinating safety for a sailboat race. Before the race starts, you instruct
all the racers to enter your group MMSI number into their radios. During the race:
xThroughout the race, you use group calling to update the racers on the time, race
status, and any course corrections.
xA power boat full of spectators comes too close to the race path. You use individual
calling to contact the power boat and advise them to stay clear of the race.
xYou see a rowboat entering the area, but since it doesn’t have a radio, you can’t
communicate with the rowboat. You use all ships calling to alert all the other boats in
the area of the possible danger.
All ships call
Group
call
Individual
call
All ships call
E-22 Uniden MHS235 Radio Owner’s Manual
Calling a single staon (Individual Call)
To call a single station with DSC, follow these steps:
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
Individual
.
3. The radio displays the names listed in your directory; use Channel Up and Channel
Down to choose the directory entry you want to call and press DISP/ENT H/M/L.
If you want to call a station that is not in your directory, select
Manual
. The radio
prompts you to enter the MMSI number you want to call. Enter the MMSI number the
same way you enter directory entries (see page 22) Enter all nine digits and press
DISP/ENT H/M/L.
4. The radio prompts you to select a response channel. Use Channel Up and Channel
Down to scroll through the available channels. When you reach the channel you
want to use for a response, press the DISP/ENT H/M/L button.
5. The radio displays the MMSI number you are about to call and asks you to conrm.
If you want to call the displayed MMSI number, select
Send (press
GPS/DISP/ENT
H/M/L). To cancel the call, select
Exit
(press CLR/SCAN).
6. The radio automatically switches to channel 70 to transmit the call request.
xWhen the other station accepts the call, both radios switch to the selected
response channel for voice transmission.
xIf the other station cannot respond on the channel you selected, the radio displays
Not support CH
.
Calling a parcular group of staons (Group Call)
Group calling calls all the stations that share your group MMSI. You must have a group
MMSI programmed into the radio to make a group call, and the stations (boats) you are
calling must have this same group MMSI programmed into their radios.
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
Group
.
3. The radio prompts you to select a response channel. Use Channel Up and Channel
Down to scroll through the available channels. When you reach the channel you
want to use for a response, press DISP/ENT H/M/L.
4. The radio asks you to conrm the call. Select
Send
(press
DISP/ENT H/M/L) to
continue with the call or select
Exit
(press CLR/SCAN) to cancel the call.
5. The radio switches to channel 70 to transmit the call request then automatically
switches to the designated response channel.
Calling all staons (All-Ships Call)
All ships calling contacts all DSC radios within range of your boat. You should only use all
ships calling in the event of a Safety warning (such as debris in the water) or to request
assistance in an Urgency (any situation where your vessel has a serious problem but is not
yet in distress).
1. Open the
Call
menu.
2. Select
All Ships
, and then choose whether this is an Urgency call or a Safety call.
3. The radio asks you to conrm the call. Select
Send
(press
DISP/ENT H/M/L) to
continue with the call or select
Exit
(press CLR/SCAN) to cancel the call.
E-23Uniden MHS235 Radio Owner’s Manual
4. The radio automatically switches to channel 70 to transmit the call request then
automatically switches to channel 16, the designated response channel for all-ships
calling.
If you have programmed your MMSI number, your radio can transmit an automated distress
call with your current location and nature of the distress. The radio then monitors channel
16 for a response and repeats the distress call every few minutes until it receives an
acknowledgement.
If you want to include the nature of your distress in the distress call, use the following
distress procedure:
1. Press DISTRESS.
2. The radio displays the list of distress conditions; use Channel Up and Channel
Down to choose the nature of your distress, then press and hold DISTRESS for three
seconds.
Undesignated Sinking Fire Overboard
Adrift Flooding Abandoning Capsizing
Collision Piracy, Armed Grounding
Canceling an automac distress call
While the radio is waiting for a response, it gives you the option of canceling the call. To
cancel the distress call, choose
Exit
and press CLR/SCAN.
If your radio receives an individual DSC call from another station, it sounds an incoming call
tone and displays the name/MMSI number of the station calling you. To respond to the call,
select
Send: Able-Comply
; the radio sends an acknowledgement and automatically switches
to the designated response channel. To reject the call, select
Send: Unable-Comply
; the
radio advises the other station that you are unable to respond to the call.
If the DSC request contains a response channel that you are not allowed to use, the radio
displays
Not Support CH
; your only response option is
Send: Unable-Comply
.
If the radio receives a group or all ships call, it sounds an incoming call tone and
automatically switches to the designated response channel.
Receive log
Just like your telephone’s caller ID list, your radio keeps track of the calls you receive. The
receive log is useful if you have been off your boat or away from your radio and want to see
who has tried to contact you. The radio displays the last 10 distress calls and the last 50
non-distress calls that it received. If you have unread incoming DSC calls, the radio displays
a Message icon. When you display all Distress and Other receiving logs, the message icon
disappears.
E-24 Uniden MHS235 Radio Owner’s Manual
1. ress and hold MENU/CALL to display the
Call
menu.
2. Select
Receive Log
.
3. Select
Distress
to see the last 10 distress calls received by the radio. Select
Other
to
see the last 50 normal calls received by the radio, then choose from
Individual
,
Group,
or
All Ships
calls.
4. Calls are listed in the order they were received, with the newest call shown rst. The
display blinks if there are new calls you have not reviewed. The Message icon also
displays.
5. Select the call you want to see the details of. Use Channel Up and Channel Down
to see all of the information. The log displays different information depending on type
of call received. See the table below for the information stored for each type of call:
DSC Call Type Receive Log Information
Distress MMSI (or name), position, time, nature code.
Distress Acknowledge MMSI (or name), distress MMSI, position, time, nature code.
All Ships MMSI (or name), category code, communication channel number.
Group MMSI (or name), category code, communication channel number.
Individual MMSI (or name), category code, communication channel number.
Individual Acknowledge MMSI (or name), Completed/Unattended, category code, communication
channel number.
Test MMSI (or name), category code.
Test Acknowledge MMSI (or name), category code.
Pos Reply MMSI (or name), position, time, category code.
Pos Request MMSI (or name), category code.
Pos Send MMSI (or name), position, time, category code.
6. From the log menu, select
Exit
to close the receive log and return to the mode you
were in.
Returning a call from the Receive Log
You can return individual calls directly from the Receive Log. From the call detail screen,
press Channel Down until
Call Back
appears at the bottom of the display. Press DISP/ENT
H/M/L to return that station’s call.
16
USA
Distress Log
123456789
246853790
357911135
Back
[MENU]
Exit
[CLR]
Save
[ENT]
Press and hold
Call Menu/
Receive Log
Distress
E-25Uniden MHS235 Radio Owner’s Manual
Making Test Calls (Test)
#
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
Test
.
3. The radio displays the names listed in your directory; use Channel Up and Channel
Down to choose the directory entry you want to send a test call to and press DISP/
ENT H/M/L.
4. If you want to send a test call to a station that is not in your directory, select
Manual
.
The radio prompts you to enter the MMSI number you want to call. Enter the MMSI
number the same way you enter directory entries (see page 22). Enter all nine digits
and press DISP/ENT H/M/L.
5. The radio displays the MMSI number you are about to call and asks you to conrm. If
you want to call the displayed number, select
Send
. To cancel the call, select
Exit
.
6. The radio automatically switches to channel 70 to transmit the test call request, then
switches back to the last-used channel.
7. When the other station acknowledges the test call, the radio displays an
acknowledgement screen.
Receiving Test Call Setup
When another station sends you a test call, you can select options to answer the test call
manually or have the radio answer automatically.
Press and hold MENU/CALL to display the
Call
menu.
8. Select
DSC Setup
and then
Test Reply
.
9. Choose
Auto
and press DISP/ENT H/M/L. The radio will automatically send an
Test
[Manual]
JIM CASSIDY
KENT NEWMAN
Back
[MENU]
Exit
[CLR]
Select
[ENT]
16
USA
Test
Press and hold
18
Test Reply
Auto
Manual
Back
[MENU]
Exit
[CLR]
Select
[ENT]
A
USA
Call Menu/
DSC Setup
Press and hold
Test Reply
E-26 Uniden MHS235 Radio Owner’s Manual
acknowledgement when it receives a test call.
10. To disable automatic test call reply, repeat the steps above and select
Manual
.
Acknowledging Test Call Receipt
Different screens display depending on whether you set the
Test Reply
to
Auto
or
Manual.
If
Test Reply
is set to
Auto
: If
Test Reply
is set to
Manual
:
18
Test
1234567890
06/20 11:00
Safety
Exit
[CLR]
A
USA
18
Test
123456789
Reply
Exit
[CLR]
A
USA
Send
[ENT]
No action is necessary. Select
Send
to send a reply.
Enabling Automac Posion Reply
If you want the radio to automatically transmit your current position whenever it receives a
position request, you can enable automatic position reply. Most boaters activate automatic
position reply for safety reasons or because they subscribe to a marine towing service.
Sometimes—for example, in some competitive situations--you may not want other stations
to get your position without your manual conrmation
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
DSC Setup
and then
Position Reply
.
3. Choose
Auto
and press DISP/ENT H/M/L. The radio will automatically transmit your
position when it receives a position request.
4. To disable automatic position reply, repeat the steps above and select
Manual
.
POS Request
Any time you need to know where another boat currently is—to nd your boating partners,
to respond to a request for assistance, etc.—you can send a position request to their radio:
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
POS Request
and press DISP/ENT H/M/L.
3. The radio displays the names listed in your directory; use Channel Up and Channel
Down to choose the directory entry you want to contact and press DISP/ENT H/M/L.
If you want to contact a station that is not in your directory, select
Manual
. The radio
prompts you to enter the MMSI number you want to call. Enter the MMSI number the
16
POS Request
[Manual]
Norwester
Harris
Back
[MENU]
Exit
[CLR]
Select
[ENT]
USA
Call Menu/
POS Request
Press and hold
E-27Uniden MHS235 Radio Owner’s Manual
same way you enter directory entries (see page 22). Enter all nine digits and press
DISP/ENT H/M/L.
4. The radio displays the MMSI number you are about to contact and asks you to
conrm. If you want to request the position of the displayed MMSI number, select
Send
. To cancel the request, select
Exit
.
5. When the other station responds, the radio displays the MMSI number, the longitude,
and the latitude of the other station. If your radio is connected to a chartplotter
through the NMEA OUT connection (see page 34), the position information will also
be displayed on the plotter screen.
6. If the other station does not have valid GPS data, the radio displays
No Position
.
Posion Reply
When another station requests your current position, different screens display depending on
whether you set
Position Reply
to
Auto
or
Manual.
If
Position Reply
is set to
Auto
: If
Position Reply
is set to
Manual
:
16
Position Request
Harris
06/20 11:00
Routine
Exit
[CLR]
USA
16
Position Request
Harris
Reply
Exit
[CLR]
USA
Send
[ENT]
No action is necessary. Select
Send
to send a reply or
Exit
to reject
the request.
Posion Send
If you are requesting assistance or using an all ships call to give a safety warning, you can
send your current position so other stations know where you are:
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
Position Send
.
3. The radio displays the names listed in your directory; use Channel Up and Channel
Down to choose the directory entry you want to contact and press DISP/ENT H/M/L.
If you want to contact a station that is not in your directory, select
Manual
. The radio
prompts you to enter the MMSI number you want to call. Enter the MMSI number the
same way you enter directory entries (see page 22). Enter all nine digits and press
DISP/ENT H/M/L.
4. The radio displays the MMSI number you are about to contact and asks you to
conrm. If you want to transmit your position to the displayed MMSI number, select
Send
. To cancel the transmission, select
Exit
.
5. The radio transmits your MMSI number, your longitude, and your latitude to the other
station.
If you are leaving your radio or do not wish to answer any DSC calls, you can put your radio
in standby mode. If your radio receives an individual call, it will automatically respond with
E-28 Uniden MHS235 Radio Owner’s Manual
a message that indicates your radio is currently unattended. Follow the steps below to put
your radio in standby:
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
Standby
to place your radio in standby mode.
3. To cancel standby and return to the mode your radio was in, press any button.
If you are involved in a bridge-to-bridge call, you may not want the radio to automatically
switch channels when it receives a DSC call. In cases like this, you can disable automatic
channel switching. If you receive an individual call, the radio will respond with an
unattended code, just as if the radio were in Standby.
1. Press and hold MENU/CALL to display the
Call
menu.
2. Select
DSC Setup
, then
Auto CH SW.
3. Select Off and press DISP/ENT H/M/L. The radio will not automatically switch
channels until you reactivate this feature.
#
If you have unread incoming DSC calls, the radio displays a message icon. You will be able
to review who has called. The radio displays the last 10 distress calls and the last 50 non-
distress calls it received (see page E-23).
Your GPS system provides more than just your specic location. The
MOB
(Man
Overboard) menu lets you immediately save your current position so rescuers can converge
on the exact man overboard location. The
Favorites
menus let you create a directory of
favorite places and their coordinates so you can easily return there. Using the GPS
Setup
menus, you can determine power-saving options, measurement increments, and time
settings.
The radio is factory-preset to search for your geographic location when it is turned on for
the rst time.
MOB
The
MOB
menu lets you quickly save your current selection so you can easily navigate back
to it. It will be saved in the rst position of the Favorites list.
16
USA
Auto CH SW
On
Off
Back
[MENU]
Exit
[CLR]
Select
[ENT]
Press and hold
Call Menu/
DSC Setup
Auto CH SW
E-29Uniden MHS235 Radio Owner’s Manual
FAvORITE
The
Favorite
menu is comprised of the
Goto
menu and the
Add
menu. The Goto menu adds
(saves) the current GPS position as well as recalls that position and others you have saved
to sail back to it.
Goto
Menu
The
Goto
menu allows you to select from a list of saved coordinates or to input coordinates
manually.
To input coordinates
1. From the
Goto
Fav.
screen, select
[Manual]
.
2. Manually input coordinates. When the last digit is entered, the screen displays
Go
and
Save
.
3. Select
Go
to display the coordinates and the compass bearing and begin traveling
towards that destination.
4. Select
Save
to save the location into a Favorites directory. When you select
Save
, the
screen prompts you to name these coordinates.
5. When you have entered a name for the saved coordinates, they will appear on the
Goto
screen as a selection.
To select a Goto entry
1. From the
Goto Fav.
screen, select from the directory entries listed.
2. The screen displays three options:
Go
,
Delete
, and
Edit
.
3. Select
Go
to display the coordinates and the compass bearing and begin traveling
towards that destination.
Select
Delete
to delete the entry.
Select
Edit
to change the entry.
Your radio supports NMEA0183, a standard for data communication between marine
instruments. If you are connected to a chartplotter and the radio receives another boat’s
position data (sentences) in a DSC call, the radio sends the position data to the chartplotter
so you can see the location.
NMEA sentences contain different sets of data. The MHS235 supports the following
sentences:
DATA RMC GLL GNS GGA ZDA
UTC Time OO O O O
18
Goto Fav.
[Manual]
Uniden
Back
[MENU]
Exit
[CLR]
Select
[ENT]
A
USA
Favorite
Press
Goto
E-30 Uniden MHS235 Radio Owner’s Manual
DATA RMC GLL GNS GGA ZDA
Status (Valid/IInvalid) O O O O X
Latitude/Longitude O O O O X
Speed O X X X X
Course O X X X X
Date O X X X O
The radio can output the following NMEA sentences:
GGA GSV DSC GSA RMC DSE
To connect to a chartplotter:
1. Connect the WHITE wire to the NMEA positive (+) output.
2. Connect the BLACK wire to the NMEA ground.
3. Connect the YELLOW wire to the NMEA positive (+) input.
#
If you discover that a marine radio channel has a different common name in your local area,
you can change the name of that channel to make it easier for you to use (see the channel
lists beginning on page E-33 for the default channel names). To rename a channel, follow the
steps below:
1. Press MENU/CALL and select
Channel Name
from the
Normal
menu. The screen
displays the list of channels.
2. Use Channel Up and Channel Down to choose the channel you want to change
and press DSP/ENT H/M/L.
3. Select
Rename
to enter a new name for this channel. The radio prompts you to enter
a new name for this channel. Each name can be up to 12 characters. Use Channel
Up and Channel Down to change the name.
4. When you nish entering the name, the radio displays the new channel name and
asks you to conrm. To save this new channel name, select
Save
; to cancel the
WHITE - to NMEA (+) output
BLACK - to NMEA ground
YELLOW - to NMEA (+) input
E-31Uniden MHS235 Radio Owner’s Manual
change, select
Exit
. The radio returns to the channel list.
5. To restore a channel back to its original name, select the channel and choose
Default
.
6. When you are satised with the channel list, select
Exit
.
Due to its rugged design, your radio requires very little maintenance. However, it is a
precision electronic instrument, so you should follow a few precautions:
xIf the antenna has been damaged, do not transmit except in an emergency situation.
Doing so may cause further radio damage.
xYou are responsible for continued FCC technical compliance of your radio.
xArrange for periodic performance checks with your Uniden dealer.
Problem Things to Try
The radio won’t turn on. Charge the radio.
The power LED on the charger
doesn’t turn on.
-Don’t use the charger when the ambient temperature is below 0° C (32°
F) or above 45° C (113° F).
-Make sure the charging contacts on the radio and charger are clean.
-Replace the battery.
The radio won’t transmit.
-Make sure you are not in Weather or Scan mode.
-Make sure you are not trying to transmit on a receive-only channel or
transmit at the wrong power level for this channel (see the channel lists
starting on page E-33.
-Check the battery power level; if it’s low, charge the battery before trying
to transmit.
-Make sure the duration of each transmission is less than 5 minutes.
I can’t hear anything from the
speaker. Adjust the squelch level; it is probably too high.
Noise comes out of the
speaker all the time Adjust the squelch level; it is probably too low.
I can transmit, but no one can
hear me.
Check your UIC channel settings: does the area you are in use different
channel assignments?
I’m not getting hazard alerts. Make sure Weather Alert Watch is turned on.
The display ashes, and I don’t
know why.
The channel number on the display will ash if the radio is in a Watch mode
or in Scan mode. Try turning off scanning, Weather Alert Watch, Triple
Watch, or Dual Watch beginning on page E-10.
Where can I nd my radio’s
serial number? The serial number is on a plate inside the battery compartment.
E-32 Uniden MHS235 Radio Owner’s Manual
General
Channels
All US/International/Canada marine channels
9 Weather channels
Freq. Control PLL
Freq. Tol. Transmit: 1.5 PPM (at 77°F/25°C)
Receive: 1.5 PPM (at 77°F/25°C)
Oper. Temp. -4°F (-20°C) to +122°F(+50°C)
Antenna Flexible Whip
Microphone Built-in Electret type
Display Liquid Crystal Display
Speaker 8Ω 1.0 W
Power Source Rechargeable Lithium Ion Battery
7.4V 1160 mAh
Size (without antenna) 6.29 (H) x 2.40 (W) x 1.61 (D) inch
160 (H) x 61 (W) x 41 (D) mm
Weight 10.9 oz (309g) (w/battery and antenna)
Transmitter
Frequency Range 156~158 MHz
Frequency Stability ±2.5 PPM max
Power Output 1W, 2.5W, and 6W
Spurious Emissions -30 dBm @ HI; -30 dBm @ LO (nominal)
Current Drain 1.5 A (6W)
Receiver
Type Double Conversion Super Heterodyne
Phase Locked Loop system for Local Oscillator
Frequency Range 156~164 MHz
Sensitivity 0.24 μV for 12dB SINAD
Squelch Sensitivity Threshold 0.2μV
Audio Frequency Response +5.5 dB @ 500 Hz; -6 dB @ 2000Hz
Adjacent Channel Selectivity 73 dB @ ±25 kHz
Audio Output Power 1.0 W @MAX VOLUME
Current Drain Squelched: 36mA; Max. Audio: 250mA
E-33Uniden MHS235 Radio Owner’s Manual
US channel frequencies and names
US Marine Channels
Ch RX Freq TX Freq Status Name
1A 156.050 156.050 Simplex Vessel trafc system/commercial
5A 156.250 156.250 Simplex Vessel trafc system/commercial
6 156.300 156.300 Simplex Inter-ship safety
7A 156.350 156.350 Simplex Commercial
8 156.400 156.400 Simplex Commercial
9 156.450 156.450 Simplex Non commercial
10 156.500 156.500 Simplex Commercial
11 156.550 156.550 Simplex Vessel trafc system
12 156.600 156.600 Simplex Vessel trafc system
13 156.650 156.650 Simplex, 1W Bridge to bridge
14 156.700 156.700 Simplex Vessel trafc system
15 156.750 Inhibit Receive only Environmental
16 156.800 156.800 Simplex Distress, safety, and calling
17 156.850 156.850 Simplex, 1W Govt maritime control
18A 156.900 156.900 Simplex Commercial
19A 156.950 156.950 Simplex Commercial
20 161.600 157.000 Duplex Port operation
20A 157.000 157.000 Simplex Port operation
21A 157.050 157.050 Simplex Coast guard only
22A 157.100 157.100 Simplex Coast guard
23A 157.150 157.150 Simplex Coast guard only
24 161.800 157.200 Duplex Marine operator
25 161.850 157.250 Duplex Marine operator
26 161.900 157.300 Duplex Marine operator
27 161.950 157.350 Duplex Marine operator
28 162.000 157.400 Duplex Marine operator
63A 156.175 156.175 Simplex Vessel trafc system
65A 156.275 156.275 Simplex Port operation
66A 156.325 156.325 Simplex Port operation
67 156.375 156.375 Simplex, 1W Bridge To Bridge
68 156.425 156.425 Simplex Non Commercial
69 156.475 156.475 Simplex Non Commercial
70 (156.5250) (156.5250) DSC Only DSC
71 156.575 156.575 Simplex Non Commercial
72 156.625 156.625 Simplex Non Commercial (Ship-Ship)
73 156.675 156.675 Simplex Port Operation
E-34 Uniden MHS235 Radio Owner’s Manual
US Marine Channels
Ch RX Freq TX Freq Status Name
74 156.725 156.725 Simplex Port Operation
75 156.775 156.775 Simplex, 1W Port Operation
76 156.825 156.825 Simplex, 1W Port Operation
77 156.875 156.875 Simplex, 1W Port Operation (Ship-Ship)
78A 156.925 156.925 Simplex Non Commercial
79A 156.975 156.975 Simplex Commercial
80A 157.025 157.025 Simplex Commercial
81A 157.075 157.075 Simplex Government
82A 157.125 157.125 Simplex Government
83A 157.175 157.175 Simplex Coast Guard
84 161.825 157.225 Duplex Marine Operator
85 161.875 157.275 Duplex Marine Operator
86 161.925 157.325 Duplex Marine Operator
87 157.375 157.375 Simplex Marine Operator
88 157.425 157.425 Simplex Commercial (Ship-Ship)
Canadian channel frequencies and names
Canadian Marine Channels
Ch RX Freq TX Freq Status Name
1 160.650 156.050 Duplex Marine Operator
2 160.700 156.100 Duplex Marine Operator
3 160.750 156.150 Duplex Marine Operator
4A 156.200 156.200 Simplex Canadian Coast Guard
5A 156.250 156.250 Simplex Vessel Trafc System
6 156.300 156.300 Simplex Inter-Ship Safety
7A 156.350 156.350 Simplex Commercial
8 156.400 156.400 Simplex Commercial
9 156.450 156.450 Simplex Boater Calling Channel
10 156.500 156.500 Simplex Commercial
11 156.550 156.550 Simplex Vessel Trafc System
12 156.600 156.600 Simplex Vessel Trafc System
13 156.650 156.650 Simplex, 1W Bridge To Bridge
14 156.700 156.700 Simplex Vessel Trafc System
15 156.750 156.750 Simplex, 1W Environmental
16 156.800 156.800 Simplex Distress, safety, calling
17 156.850 156.850 Simplex, 1W State Control
18A 156.900 156.900 Simplex Commercial
19A 156.950 156.950 Simplex Canadian Coast Guard
20 161.600 157.000 Duplex, 1W Port Operation
21A 157.050 157.050 Simplex Canadian Coast Guard
E-35Uniden MHS235 Radio Owner’s Manual
Canadian Marine Channels
Ch RX Freq TX Freq Status Name
22A 157.100 157.100 Simplex Canadian Coast Guard
23 161.750 157.150 Duplex Marine Operator
24 161.800 157.200 Duplex Marine Operator
25 161.850 157.250 Duplex Marine Operator
26 161.900 157.300 Duplex Marine Operator
27 161.950 157.350 Duplex Marine Operator
28 162.000 157.400 Duplex Marine Operator
60 160.625 156.025 Duplex Marine Operator
61A 156.075 156.075 Simplex Canadian Coast Guard
62A 156.125 156.125 Simplex Canadian Coast Guard
63A 156.175 156.175 Simplex Port Operation
64 160.825 156.225 Duplex Marine Operator
64A 156.225 156.225 Simplex Port Operation
65A 156.275 156.275 Simplex Port Operation
66A 156.325 156.325 Simplex, 1W Port Operation
67 156.375 156.375 Simplex Bridge To Bridge
68 156.425 156.425 Simplex Non Commercial
69 156.475 156.475 Simplex Non Commercial
70 (156.5250) (156.5250) DSC Only DSC
71 156.575 156.575 Simplex Non Commercial
72 156.625 156.625 Simplex Non Commercial
73 156.675 156.675 Simplex Port Operation
74 156.725 156.725 Simplex Port Operation
75 156.775 156.775 Simplex, 1W Port Operation
76 156.825 156.825 Simplex, 1W Port Operation
77 156.875 156.875 Simplex, 1W Port Operation
78A 156.925 156.925 Simplex Inter Ship
79A 156.975 156.975 Simplex Inter Ship
80A 157.025 157.025 Simplex Inter Ship
81A 157.075 157.075 Simplex Canadian Coast Guard
82A 157.125 157.125 Simplex Canadian Coast Guard
83 161.775 157.175 Duplex Canadian Coast Guard
83A 157.175 157.175 Simplex Canadian Coast Guard
84 161.825 157.225 Duplex Marine Operator
85 161.875 157.275 Duplex Marine Operator
86 161.925 157.325 Duplex Marine Operator
87 157.375 157.375 Simplex Port Operation
88 157.425 157.425 Simplex Port Operation
E-36 Uniden MHS235 Radio Owner’s Manual
Internaonal channel frequencies and names
Ch RX Freq TX Freq Status Name on display
1 160.6500 156.0500 Duplex Marine operator
2 160.7000 156.1000 Duplex Marine operator
3 160.7500 156.1500 Duplex Marine operator
4 160.8000 156.2000 Duplex Marine operator
5 160.8500 156.2500 Duplex Marine operator
6 156.3000 156.3000 Simplex Inter-ship safety
7 160.9500 156.3500 Duplex Marine operator
8 156.4000 156.4000 Simplex Commercial (ship-ship)
9 156.4500 156.4500 Simplex Boater calling channel
10 156.5000 156.5000 Simplex Commercial
11 156.5500 156.5500 Simplex Vessel trafc system
12 156.6000 156.6000 Simplex Vessel trafc system
13 156.6500 156.6500 Simplex Bridge to bridge
14 156.7000 156.7000 Simplex Vessel trafc system
15 156.7500 156.7500 Simplex, 1W Environmental
16 156.8000 156.8000 Simplex Distress, Safety, Calling
17 156.8500 156.8500 Simplex, 1W Govt maritime control
18 161.5000 156.9000 Duplex Port operation
19 161.5500 156.9500 Duplex Commercial
20 161.6000 157.0000 Duplex Port operation
21 161.6500 157.0500 Duplex Port operation
22 161.7000 157.1000 Duplex Port operation
23 161.7500 157.1500 Duplex Marine operator
24 161.8000 157.2000 Duplex Marine operator
25 161.8500 157.2500 Duplex Marine operator
26 161.9000 157.3000 Duplex Marine operator
27 161.9500 157.3500 Duplex Marine operator
28 162.0000 157.4000 Duplex Marine operator
60 160.6250 156.0250 Duplex Marine operator
61 160.6750 156.0750 Duplex Marine operator
62 160.7250 156.1250 Duplex Marine operator
E-37Uniden MHS235 Radio Owner’s Manual
Ch RX Freq TX Freq Status Name on display
63 160.7750 156.1750 Duplex Marine operator
64 160.8250 156.2250 Duplex Marine operator
65 160.8750 156.2750 Duplex Marine operator
66 160.9250 156.3250 Duplex Marine operator
67 156.3750 156.3750 Simplex Bridge to bridge
68 156.4250 156.4250 Simplex Non commercial
69 156.4750 156.4750 Simplex Non commercial
70 (156.5250) (156.5250) DSC Only DSC
71 156.5750 156.5750 Simplex Non commercial
72 156.6250 156.6250 Simplex Non commercial
73 156.6750 156.6750 Simplex Port operation
74 156.7250 156.7250 Simplex Port operation
75 156.7750 156.7750 Simplex, 1W Port operation
76 156.8250 156.8250 Simplex, Port operation
77 156.8750 156.8750 Simplex Port operation (ship-ship)
78 161.5250 156.9250 Duplex Port operation
79 161.5750 156.9750 Duplex Port operation
80 161.6250 157.0250 Duplex Port operation
81 161.6750 157.0750 Duplex Port operation
82 161.7250 157.1250 Duplex Port operation
83 161.7750 157.1750 Duplex Port operation
84 161.8250 157.2250 Duplex Marine operator
85 161.8750 157.2750 Duplex Marine operator
86 161.9250 157.3250 Duplex Marine operator
87* 157.3750 157.3750 Simplex Marine operator
88* 157.4250 157.4250 Simplex Marine operator
Weather channel frequencies and names
Channel RX Channel RX
WX01 162.5500 WX06 162.5000
WX02 162.4000 WX07 162.5250
WX03 162.4750 WX08 161.6500
WX04 162.4250 WX09 161.7750
WX05 162.4500
E-38 Uniden MHS235 Radio Owner’s Manual
Warning! This transmitter will operate on channels/frequencies that have restricted use in the Unit-
ed States. The channel assignments include frequencies assigned for exclusive use of the U.S.
Coast Guard, use in Canada, and use in international waters. Operation on these frequencies with-
out proper authorization is strictly forbidden. See page E-33 for tables of the available channels and
their uses. If you are still not certain which channels to use, see the FCC maritime radio page at the
FCC website
(http://wireless.fcc.gov/marine/) or contact the FCC Call Center at 1-888-CALL-FCC. For individu-
als requiring a license, such as commercial users, you should obtain a license application from your
nearest FCC eld ofce (for US users) or Industry Canada (for Canadian users).
You should familiarize yourself with the rules on marine radios and be aware of which rules apply
to your boat. Complete guidelines for all ship and marine radio types can be found at the US Coast
Guard website under the topic Radio Info for Boaters (the direct link is http://www.navcen.uscg.
gov/?pageName=mtBoater. Here are a few guidelines that affect nearly all boaters.
• If you have a VHF radio on your boat, you must maintain a watch on channel 16 (156.800 MHz)
whenever the radio is not being used to communicate. Starting in 2004, if a radio is carried, it
must be on and set to channel 16. Whenever your boat is underway.
• If you hear a distress call, wait a few minutes to let a shore station or Coast Guard vessel re-
spond. If no other station has responded after 5 minutes, you must respond to the distress call.
• Do not make false mayday or distress calls as a prank or to test your radio. (This is essentially
like making a false 9-1-1 call; you may be subject to nes.)
Certication: FCC Part 80 or RSS-182
Output Power: 6W
Emission: 16K0F3E
Transmitter Frequency Range: 156.025-157.425 MHz
This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this
device does not cause harmful interference.
Unauthorized changes or modications to this equipment may void compliance with the FCC Rules.
Any change or modication must be approved in writing by Uniden. Changes or modications not
approved by Uniden could void the user’s authority to operate the equipment.
In August 1996 the Federal Communications Commission (FCC) of the United States with its action
in Report and Order FCC 96-326 adopted an updated safety standard for human exposure to radio
frequency electromagnetic energy emitted by FCC regulated transmitters. Those guidelines are con-
sistent with the safety standard previously set by both U.S. and international standards bodies. The
design of the radio complies with the FCC guidelines and these international standards.
Never allow children to operate the radio without adult supervision and the knowledge of the follow-
WARNING! Read this information before using the radio.
E-39Uniden MHS235 Radio Owner’s Manual
ing guidelines.
WARNING! It is up to the user to properly operate this radio transmitter to insure safe operation.
Please adhere to the following:
Use only the supplied or an approved antenna. Unauthorized antennas, modications, or attach-
ments could impair call quality, damage the radio, or violate FCC regulations.
Do not use the radio with a damaged antenna. If a damaged antenna comes into contact with the
skin, a minor burn may result. Please contact your local dealer for a replacement antenna.
To maintain compliance with FCC RF exposure requirements, the radio must be used with a maxi-
mum duty cycle not exceeding 50% in a typical push-to-talk radio use time. DO NOT transmit for
more than 50% of total radio use time.
This device was tested for typical body-worn operations using the supplied belt-clip. To maintain
compliance with FCC RF exposure requirements, body-worn operations are restricted to the sup-
plied belt-clip. For hand-held operation, the radio should be held 1 inch from the user’s face. The
use of accessories that do not satisfy these requirements may not comply with FCC RF exposure
requirements and should be avoided. For more information about RF exposure, please visit the FCC
website at www.fcc.gov.
This equipment contains a rechargeable Lithium Ion battery. The rechargeable Lithium Ion battery
contained in this equipment may explode if disposed of in a re.
Do not short-circuit the battery.
Do not charge the rechargeable battery used in this equipment in any charger other than the one
specied in the owner’s manual. Using another charger may damage the battery or cause the bat-
tery to explode.
NOTE: Li-Ion batteries must be recycled or disposed of properly.
Avoid exposing the battery (whether attached to the radio or not) to direct sunlight, heated cars, or
temperatures below -4°F (-20°C) or above +140°F (+60°C). Exposing the chemical contained within
the battery pack to temperatures above +140°F (+60°C) may cause the battery to rupture, fail, or
reduce performance.
In case of exposure to the cell contents, wash the affected area thoroughly, and seek medical at-
tention.
As part of our commitment to protect the environment and conserve natural
resources, Uniden voluntarily participates in an RBRC® industry program to
collect and recycle used Li-Ion batteries within the US.
Please call 1-800-8-BATTERY for information on Li-Ion battery recycling in
your area.
(RBRC® is a registered trademark of the Rechargeable Battery Recycling
Corporation.)
WARRANTOR: UNIDEN AMERICA CORP. (“Uniden”)
ELEMENTS OF WARRANTY: Uniden warrants, for three years, to the original retail owner, this Un-
iden Product to be free from defects in materials and craftsmanship with only the limitations or ex-
E-40 Uniden MHS235 Radio Owner’s Manual
clusions set out below.
WARRANTY DURATION: This warranty to the original user shall terminate and be of no further ef-
fect 36 months after the date of original retail sale. The warranty is invalid if the Product is (A) dam-
aged or not maintained as reasonable or necessary, (B) modied, altered, or used as part of any
conversion kits, subassemblies, or any congurations not sold by Uniden, (C) improperly installed,
(D) serviced or repaired by someone other than an authorized Uniden service center for a defect or
malfunction covered by this warranty, (E) used in any conjunction with equipment or parts or as part
of any system not manufactured by Uniden, or (F) installed or programmed by anyone other than as
detailed by the Operating Guide for this product.
STATEMENT OF REMEDY: In the event that the product does not conform to this warranty at any
time while this war-ranty is in effect, warrantor will repair the defect and return it to you without
charge for parts, service, or any other cost (except shipping and handling) incurred by warrantor or
its representatives in connection with the performance of this warranty. THE LIMITED WARRANTY
SET FORTH ABOVE IS THE SOLE AND ENTIRE WARRANTY PERTAINING TO THE PRODUCT
AND IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES OF ANY NATURE WHATSO-
EVER, WHETHER EXPRESS, IMPLIED OR ARISING BY OPERATION OF LAW, INCLUDING, BUT
NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. THIS WARRANTY DOES NOT COVER OR PROVIDE FOR THE REIM-
BURSEMENT OR PAYMENT OF INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do
not allow this exclusion or limitation of incidental or consequential damages so the above limitation
or exclusion may not apply to you.
LEGAL REMEDIES: This warranty gives you specic legal rights, and you may also have other
rights which vary from state to state. This warranty is void outside the United States of America.
PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY: If, after following the instruc-
tions in this Operating Guide you are certain that the Product is defective, pack the Product carefully
(preferably in its original packaging). Include evidence of original purchase and a note describing
the defect that has caused you to return it. The Product should be shipped freight prepaid, by trace-
able means, or delivered, to warrantor at:
Uniden America Corporation
Parts and Service Division
4700 Amon Carter Boulevard
Fort Worth, TX, 76155
(800) 554-3988
E-41Uniden MHS235 Radio Owner’s Manual
U01UT645AZZ(0)
QUESTIONS?
Contactez-nous au
www.uniden.com ou
appelez 1-800-297-1023.
Imprimé au Vietnam
QUESTIONS?
Visit our website at
www.uniden.com or
call 1-800-297-1023.
Printed in Vietnam