Uniden MHS235 Owner`s manual

MHS235
FLOATING VHF MARINE RADIO
RADIO VHF MARITIME FLOTTANTE
OWNER’S MANUAL
GUIDE D’UTILISATION
Making a Distress Call
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.
Lift the red
cover and
press the red
DISTRESS
button
underneath.
## NOTE: If the radio displays Enter User MMSI, cancel the
automatic distress call and make a normal voice distress call.
Making a Voice Distress Call
Speak slowly - clearly - calmly.
For future reference, write your boat’s name & call sign here:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Make sure your radio is on.
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.)
Press the PUSH TO TALK button and say: “MAYDAY -- MAYDAY -- MAYDAY.”
Say “THIS IS {name of your boat (three times) and call sign/boat registration
number (once).”
Repeat “MAYDAY {name of your boat}” once.
Tell where you are: (what navigational aids or landmarks are near, or read the
latitude and longitude from your GPS).
State the nature of your distress (e.g. are you sinking, medical emergency, man
overboard, on fire, adrift, etc. ).
State the type of assistance you need (medical, towing, pumps, etc.).
Give number of persons aboard and conditions of any injured persons.
Estimate present seaworthiness of your ship (e.g. how immediate is the danger due
to flooding or fire or proximity to shore).
Briefly describe your ship, giving ship name (e.g. “Blue Duck is 32 foot cabin cruiser,
white hull, blue deck house”).
Say: “I WILL BE LISTENING ON CHANNEL 16.”
End message by saying “THIS IS {name or call sign of your boat}, OVER.”
Release the PUSH TO TALK button and listen.
If you do not get an answer after 30 seconds, repeat your call, beginning at step 3, above.
FAIRE UN APPEL DE DÉTRESSE
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.
##
Remarque : Si la radio affiche Enter User MMSI, annulez l’appel
de détresse automatique et effectuez un appel de détresse
vocal normal.
Soulevez le
couvercle noir
et appuyez sur
le bouton rouge
Distress en
dessous.
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. Vérifiez si votre radio est en marche.
2. Appuyez sur la touche 16/9-TRI afin de commuter au canal 16 (156,8 MHz). (Si le canal
16 n’apparaît pas à l’affichage, appuyez de nouveau sur la touche 16/9-TRI jusqu’à ce
qu’il soit affiché.)
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’identification 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 rouffle 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.
Si vous n’obtenez pas de réponse après 30 secondes, répétez l’appel
encommençant à l’étape 3 ci-dessus.
Table of Contents
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
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
MOB Menu................................... E-28
Favorite Menu.............................. E-28
NMEA Features.......................... E-29
ADDITIONAL FEATURES.......... E-30
Renaming Channels ................... E-30
Making an automatic distress call.E-23
Maintenance and
Troubleshooting.................. E-31
Receiving a DSC call................... E-23
Specifications............................ E-31
Canceling an automatic
distress 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
Common Questions..................... 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
Introduction
Features
Your radio provides the following key features:
xx Submersible design. Complies with floating JIS8/IPX8 water-resistant standards,
which means the radio can be submerged in 1.5 meters of water for 1 hour without
damage.
## Notes:
The radio will only meet this rating if fully assembled and all rubber seals and
bungs are well maintained and correctly fitted. This means that the speaker
microphone bung is inserted, and the battery pack (or case) and antenna are
attached and securely fastened.
Uniden MHS235 Radio Owner’s Manual
E-1
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.
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
E-2
Memory Scan mode. Lets you save channels to memory and monitor them in quick
succession.
Transmitter power level select. Lets you boost the transmitter power from 1W to 2.5
or 6W for added transmission distance.
Battery level display and low battery alert.
Dual 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.
All marine VHF channels for the U.S., Canada, and international waters
Emergency 16/09 Channel monitoring. Set unit to scan one or both of these
emergency channels regularly within normal scanning cycles.
Class D second receiver is dedicated to monitoring the DSC watch channel 70 to
ensure that no incoming messages are missed.
National Oceanic and Atmospheric Administration (NOAA) Weather Channel
watch. Sounds a warning tone when a hazard alert is issued.
SOS Strobe/Flashlight. A high intensity strobe LED can be set to blink an SOS
pattern or to be steady on.
Temperature. The thermal sensor lets you measure both water and air temperature.
You can display temperature in Farenheit or Celsius.
Key Lock. Locks keys to prevent accidentally changing channels or entering data.
Selectable Backlight Timer. Lets you select the length of time the backlight will be
on.
Reversable LCD. You can change the display from light characters on dark
background to dark characters on light background.
DSC. Lets you call other stations or groups using their unique identification code. This
radio complies with International Class D DSC standards for Handheld GPS/VHF
marine transceivers.
GPS (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.
NMEA input/output. Lets you connect to a chartplotter and determine what NMEA
data you want to receive.
9 weather channels available for monitoring.
Boost. Allows you to instantly transmit at a full 6 Watts.
MOB (Man Overboard). Lets you lock onto the current position when a Man
Overboard situation occurs.
Compass 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 northsouth-east-west display. Automatically auto-plots to a received DSC distress call.
Uniden MHS235 Radio Owner’s Manual
Getting Started
What’s included
Accessory Battery
Tray
(batteries not
included)
Antenna
Belt Clip
Lithium Ion
Rechargeable Battery
MHS235 Radio
Wrist Strap
Charging Cradle
AC Adapter
Mounting Hardware
Not shown:
External speaker/
microphone
DC Adapter
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.
Parts of the MHS235
Front view
Microphone/Speaker
connection
Distress
button
GPS/MEM CLR/SCAN
button
button
VOL/SQ
button
DISP/ENTERH/M/L button
LCD
Display
Antenna
Power
Push-to-talk
button
Button
Push -to-Talk
N/A
Boost
N/A
Microphone
Speaker
MENU/CALL
UP/DOWN
STROBE/FLASHLIGHT
button
buttons WX/SOS
LED
16/9-Tri
button
Note: Thermal sensor on back.
(16/9- triple
watch) button
BOOST
button
Press to...
Press and hold to...
Transmit on a current TX power.
Boost TX to 1.5w (NiMH rechargeable
batteries) or 6W (TX power).
1st press: Go to CH 16.
16/9-Tri
▲/▼
2nd press: Go to CH 9.
3rd press: Go back to the starting
channel.
Scroll up or down through one
channel and data at a time when in
Marine or Menu mode.
Turn Triple or Dual Watch mode on
and off.
Quickly scroll up or down through
channels and data when in Marine or
Menu mode.
Uniden MHS235 Radio Owner’s Manual
E-3
Button
WX/SOS
◄
MENU/CALL
DISP/ENT H/M/L/
CLR/SCAN
GPS/MEM
►
VOL/SQ
Press to...
-- Turn Weather mode on and off.
-- Return to last marine channel.
-- Move cursor to the left while in
Menu mode.
-- Return to previous menu.
Access the Normal menu.
-- Scroll through the 5 available
information display menus.
-- Select menu items.
-- Return to normal Marine mode
when Marine channel list is
displayed.
Exit menu screens.
-- Enter or exit GPS menu.
-- Move cursor to the right while in
Menu mode.
Enter or exit Volume Setting mode.
Press and hold to...
Turn on the strobe SOS signal. Press
and hold again to change to the
flashlight. Press and hold again to turn
off the LED.
Access DSC call menu.
Change the TX power between LO
(1W), MID (2.5W), and 6W (HI).
Enter or exit Scan mode.
Store or delete the current channel into
memory.
Enter or exit the Squelch setting mode.
Power
Turn MHS235 on and off.
Distress
Sends out emergency signal.
Back view
Battery
latch
E-4
Battery charging
contacts
Battery
Belt clip
Uniden MHS235 Radio Owner’s Manual
Charger
Power jack
[cigarette (DC) or
wall (AC) plug]
Charging
contacts
Screw holes
for mounting
Charging
latches
CHARGE LED
Reading the display
NMEA contacts
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.
Channel
mode
Ambient
temperature
Battery
status
Time
GPS data
Transmit
power level
Current channel
number
HI
MEM
Keylock is
active
35˚ 40.610 N
139˚ 46.564 E
A
COMMERCIAL
Display icons and what they mean
Icon
Weather Alert
Watch is on
USA
87˚F
11:00AM
Channel name
This channel is
in Memory
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
COG
DIST
Bearing from boat’s position to destination from Favorite’s list.
Current course (Course over Ground). COG displays when Favorite mode or
Compass mode is active, or when a DSC distress call is received.
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.
Uniden MHS235 Radio Owner’s Manual
E-5
Icon
What it means
CX
OFF
Automatic Channel Switch when receiving a DSC call is off.
Compass icon shows when a DSC distress call has been received, a Favorite
N
W A
location has been selected, or the Compass main display screen has been
E
selected.
S
Position mark. Indicates the target point.
How It Works
Displays
Press the DISP/ENT H/M/L key to display the following screens:
xx Marine mode
xx Position mode
xx Favorite mode
xx Compass mode
xx Temperature mode
xx GPS Status mode
The last screen displayed will display again the next time the unit is powered up.
Menus
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 Menus
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-6
Uniden 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.
Uniden MHS235 Radio Owner’s Manual
E-7
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 configure 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-8
Uniden MHS235 Radio Owner’s Manual
Operation Modes
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 Monitor a channel or talk to
lets you talk on that channel.
another radio.
(default mode)
Scan
Monitors all the channels you save
into memory.
Check a small group of regularlyused channels for traffic.
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 briefly
checks for activity on a specific 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.
## Note: Private boats must monitor channel 16. Whenever they are underway. Water-going
vessels should have either Triple Watch or Dual Watch on at all times.
Normal
xx
xx
xx
xx
xx
To transmit, remove the radio from the charger, then press and hold Push to Talk.
Release the button when you are finished talking.
For the best sound quality, hold the microphone about two inches from your mouth
while you’re talking.
Press Channel Up to move up one channel at a time. Press and hold the button to
scroll quickly up the channels.
Press Channel Down to move down one channel at a time. Press and hold the button
to scroll quickly down the channels.
To 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).
## If you are using NiMH batteries, 6W is not available.
Uniden MHS235 Radio Owner’s Manual
E-9
Normal Mode with Weather Alert Watch
Monitoring Channel 25
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 finish your transmission
before checking the weather channel.)
Normal Mode with Triple Watch or Dual Watch
Every 7 seconds,
the radio checks
the last-used
weather channel.
wx
WX Alert
Watch on
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 finished 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.
When it detects a signal, the radio stays
on the channel until you press the
Channel Up button or the signal stops.
08
10
11
12
13
Resume
scan
14
15
17
The radio scans about
5 channels in 0.3 seconds.
Using the Radio in Scan Mode
xx
xx
xx
xx
xx
xx
xx
To activate Scan mode, press and hold CLR/SCAN. The radio scans channels in
memory.
You must have at least two channels in memory to start a scan.
You cannot transmit while in Scan mode.
To 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.
To 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.
When the radio stays on a channel, press Channel Up to leave that channel and
resume scanning.
To 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:
E-10
Uniden MHS235 Radio Owner’s Manual
Scan Mode with Triple Watch or Dual Watch
Memory Channel Scan
08
10
11
12
13
14 15 17 20 24 25
Every 7 seconds, the radio
checks the last-used
weather channel, then
scans the next channel.
wx
WX Alert
Watch on
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:
Memory Channel Scan
08 10 11 12 13 14
Every 2 seconds, the
radio checks channels
16 & 9, then scans
the next channel.
16 09
Triple
15
17
20
24
25
Watch on
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:
Memory Channel Scan
08 10 11 12 13 14 15 17 20 24 25
Every 2 seconds, the
Every 7 seconds, the radio
radio checks channels
checks the last-used
16 & 9, then scans
weather channel, then
the next channel.
scans the next channel.
16 09
Triple
WX Alert wx
Watch on
Watch on
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
xx
xx
xx
xx
You cannot transmit while in Weather mode.
To enter Weather mode, press WX/SOS.
To turn off the radio’s alert tone, press any button.
To 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
Uniden MHS235 Radio Owner’s Manual
E-11
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.
Monitoring Weather Channel WX08
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.
16 09
16 09
16 09
Every 2 seconds, the radio checks
channel 16, then channel 9
with Triple Watch on
Setting Up the Hardware
Attaching the Antenna
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.
Installing the Battery
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.
## Note: Each time you remove the battery, check the rubber seal around the battery
compartment. Make sure the seal is seated in the groove and there is no dirt or debris on
it. If the seal looks worn or damaged, contact customer service to order a replacement (see
back cover page for contact information).
2.
Lower the battery until it rests flat in the compartment.
3.
Bring the battery latch up and snap it into place.
Using Rechargeable Batteries
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.
## NOTE: When using rechargeable batteries, transmit power is limited to a maximum of
1.5W.
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 fits 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).
E-12
Uniden MHS235 Radio Owner’s Manual
WARNING! The accessory battery tray is designed to prevent the accidental charging of nonrechargeable batteries. Never use rechargeable batteries in the radio without the accessory
battery tray.
Mounting the Charger
You can mount the charger on any flat 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.
## The charger must be mounted at least 2 feet (24 inches) from the compass to prevent
magnetic interference with either device.
Charging the Battery
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.
Cautions:
xx
xx
xx
Use only the battery and charger supplied with this
radio. Using a different charger or battery can damage
the radio and create a risk of fire or shock.
The 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).
Wipe 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 battery
xx
xx
xx
Charge the battery fully before using the radio.
Don’t use the charger when the ambient temperature is below 0° C (32° F) or above
45° C (113° F).
If 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.)
Setting Up Your Radio
Turning It On
Press the POWER button for at least two seconds to turn the radio on. Press and hold it to
turn the unit off.
Entering the User MMSI
When you power up your radio for the first 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
Uniden MHS235 Radio Owner’s Manual
E-13
your specific User MMSI number and enter it.
## If you must change your user MMSI, instructions are on the Uniden website (www.uniden.
com). You can also call Uniden’s Customer Care Line at 1-800-297-1023.
Setting It Up
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 first 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 Location
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.
## Do not let anything obstruct the antenna, such as a metal cabin ceiling.
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).
Setting 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 filtering out any background
channel noise. At the lowest squelch level, the speaker plays all signals, including any
channel noise. Setting the squelch level higher filters 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).
## Note: Setting the squelch level too high may prevent you from hearing weaker transmissions.
If you are having difficulty hearing a transmission, try setting the squelch level lower.
Setting 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-14
Uniden MHS235 Radio Owner’s Manual
Setting 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.
Setting 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 notifications. Turn WX
Alert OFF through the Normal menu as well.
Setting FIPS Codes
FIPS codes identify counties in the United States. FIPS codes allow you to receive only the
SAME alert occurring in a specific area. You can enter a maximum of 30 FIPS codes.
## For USA FIPS codes by state, see http://www.nws.noaa.gov/mirs/public/prods/maps/cnty_
fips_list.htm. For Canadian FIPS codes, see http://www.msc.ec.gc.ca/msb/weatheradio/
transmitter/index_e.cfmx.
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.
Adjusting the Lamp
The backlight LCD function can be set to automatically dim after a set time.
1.
Press MENU/CALL and select Radio 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
10 sec
30 sec
1 min
3 min
5 min
xx
xx
xx
xx
xx
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 Radio 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.
Setting the Air or WaterTemperature Measurement
You can set the temperature to display in Celsius or Farenheit.
1.
Press MENU/CALL and select select Radio Setup/Temperature.
2.
Temperature options are °C (Celsius) or °F (Farenheit).
Uniden MHS235 Radio Owner’s Manual
E-15
## The temperature may not display correctly if the internal temperature of the radio is high
(i.e., being out in the sun or a high receiver audio output).
Turning the Key Beep On and Off
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 Radio Setup/Key Beep. Press Channel Up or Channel
Down to turn the key beep on or off.
Operating the Radio
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 finished talking to let the other party respond.
xx To 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.
xx For the best sound quality, hold the microphone about two inches away from your
mouth.
xx See 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 find 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).
3.
Current power
Press and hold DISP/ENT
level (W)
H/M/L to change to... (W)
1
2.5
MID
2.5
6
6W
6
1
LO
Displays
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.
## Note: Don’t forget to change the transmission setting back to 1W when you move close to
other stations.
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-16
Uniden MHS235 Radio Owner’s Manual
Changing the Channel
Press the Channel Up and Channel Down buttons briefly 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 flashes “S O S” in international Morse
Code.
## NOTE: Your radio operates normally when the SOS strobe is activated. However, the SOS key
is disabled during Key Lock and MENU operation.
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 Features
What is DSC?
Digital Selective Calling (DSC) is a standard that allows you to call other stations using
their unique identification 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.
Advanced DSC features
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.
Uniden MHS235 Radio Owner’s Manual
E-17
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 configured 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
MMSI Numbers
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 fleets, boating organizations, event
coordinators, etc.
You can get more information on MMSI numbers at these resources:
xx The dealer where you purchased the radio
xx Recreational 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)
xx Commercial 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:
xx Capital letters (A through Z)
xx Lower-case letters (a through z)
xx Punctuation (/ ‘ + -)
xx Numbers (0 through 9)
xx One blank space
E-18
Uniden MHS235 Radio Owner’s Manual
Entering Your User MMSI Number
## NOTE: Be sure you have the correct User MMSI number before entering it in the radio. The
radio only allows you to enter the User MMSI once. If you need to re-enter the User MMSI
number, contact customer service (see back page for contact information).
When you power up your radio for the first 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
confirm it. Press DISP/ENT H/M/L to save it.
4.
Before saving the number, the radio displays the message Confirm 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 first digit of a group
MMSI is fixed at “0.” Follow the steps below to enter a group MMSI number into the radio:
Press and hold
DSC Setup
Use the up and down arrows
to adjust each of the eight
digits in turn.
Group MMSI
Group MMSI
0________
16
USA
Back
[MENU]
Save
[ENT]
Exit
[CLR]
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 confirm.
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:
Press and hold
Call Menu
DSC Setup
Use the up and down arrows
to adjust each of the nine
digits in turn.
Directory
Name
[New]
1.
MMSI
0________
Back
[MENU]
16
USA
Save
[ENT]
Exit
[CLR]
Press and hold MENU/CALL to display the Call Menu.
Uniden MHS235 Radio Owner’s Manual
E-19
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 field.
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 confirm. To
save this MMSI number and name, press DISP/ENT H/M/L To cancel this MMSI
number, press CLR/SCAN.
Using the Directory
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:
Press and hold
Call Menu/
DSC Setup
Directory
Select an
entry
Edit
MMSI
123456789
Name
Uniden
16
USA
Back
[MENU]
1.
Save
[ENT]
Exit
[CLR]
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 confirmation 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 satisfied with the directory list, press CLR/SCAN to close the menu
screen.
Making DSC Calls
There are essentially four different types of DSC voice calls:
E-20
Uniden 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:
xx Throughout the race, you use group calling to update the racers on the time, race
status, and any course corrections.
xx A 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.
xx You 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
All ships call
Group
call
Individual
call
Uniden MHS235 Radio Owner’s Manual
E-21
Calling a single station (Individual Call)
To call a single station with DSC, follow these steps:
Press and hold MENU/CALL to display the Call menu.
1.
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 confirm.
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.
When the other station accepts the call, both radios switch to the selected
response channel for voice transmission.
xx If the other station cannot respond on the channel you selected, the radio displays
Not support CH.
xx
Calling a particular group of stations (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 confirm 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 stations (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 confirm 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-22
Uniden 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.
Making an automatic distress call
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.
To send an automatic distress call, press and hold DISTRESS for three seconds. If no MMSI
number has been programmed, the radio prompts you to enter your MMSI number.
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 automatic 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.
Receiving a DSC call
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.
Uniden MHS235 Radio Owner’s Manual
E-23
1.
ress and hold MENU/CALL to display the Call menu.
Press and hold
Call Menu/
Receive Log
Distress
Distress Log
123456789
246853790
357911135
Back
[MENU]
16
USA
Save
[ENT]
Exit
[CLR]
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 first. 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.
E-24
Uniden MHS235 Radio Owner’s Manual
Test Calls
Making Test Calls (Test)
## You can use the test call feature to make sure your radio is working and configured correctly.
To avoid overloading coastal receiving stations, you should limit test calls to these stations to
once a week.
NOTE: Many coastal stations have specific frequencies and MMSI numbers you should use
for making test calls. Before making a test call to a coastal station, be sure to check the Local
Notice to Mariners (LNM), issued every week by the US Coast Guard. The LNMs for each
region are available online at http://www.navcen.uscg.gov/?pageName=lnmMain.
Press and hold
Test
Test
[Manual]
JIM CASSIDY
KENT NEWMAN
16
USA
Back
[MENU]
1.
Exit
[CLR]
Select
[ENT]
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 confirm. 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
Test Reply
Call Menu/
DSC Setup
Test Reply
18
Auto
Manual
Back
[MENU]
A
USA
Select
[ENT]
Exit
[CLR]
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
Uniden MHS235 Radio Owner’s Manual
E-25
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:
Test
1234567890
06/20 11:00
Safety
If Test Reply is set to Manual:
Test
123456789
18
18
Reply
A
A
USA
USA
Send
[ENT]
Exit
[CLR]
No action is necessary.
Exit
[CLR]
Select Send to send a reply.
Position Request and Reply
Enabling Automatic Position 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 confirmation
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 find your boating partners,
to respond to a request for assistance, etc.—you can send a position request to their radio:
Press and hold
Call Menu/
POS Request
POS Request
[Manual]
Norwester
Harris
Back
[MENU]
16
USA
Select
[ENT]
Exit
[CLR]
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
E-26
Uniden 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
confirm. 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.
Position 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:
Position Request
Harris
Position Request
Harris
06/20 11:00
Routine
USA
16
No action is necessary.
16
Reply
USA
Exit
[CLR]
Send
[ENT]
Exit
[CLR]
Select Send to send a reply or Exit to reject
the request.
Position 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
confirm. 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.
Putting the radio into standby
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
Uniden MHS235 Radio Owner’s Manual
E-27
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.
Disabling automatic channel switching
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.
Press and hold
Call Menu/
DSC Setup
Auto CH SW
Auto CH SW
16
On
Off
Back
[MENU]
USA
Select
[ENT]
Exit
[CLR]
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.
## NOTE: Use this feature with caution. Deactivating automatic switching and then forgetting it
can make it hard for you to receive DSC calls.
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 nondistress calls it received (see page E-23).
GPS Features
GPS Operation Overview
Your GPS system provides more than just your specific 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 first time.
MOB Menu
The MOB menu lets you quickly save your current selection so you can easily navigate back
to it. It will be saved in the first position of the Favorites list.
E-28
Uniden MHS235 Radio Owner’s Manual
Favorite Menu
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.
Press
Favorite
Goto
Goto Fav.
[Manual]
Uniden
18
A
USA
Back
[MENU]
Select
[ENT]
Exit
[CLR]
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.
NMEA Features
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
UTC Time
RMC
GLL
GNS
GGA
ZDA
O
O
O
O
O
Uniden MHS235 Radio Owner’s Manual
E-29
DATA
RMC
GLL
GNS
GGA
Status (Valid/IInvalid)
O
O
O
O
ZDA
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:
WHITE - to NMEA (+) output
BLACK - to NMEA ground
YELLOW - to NMEA (+) input
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.
## NOTE: Use waterproof tape to seal electrical connections.
ADDITIONAL FEATURES
Renaming Channels
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 finish entering the name, the radio displays the new channel name and
asks you to confirm. To save this new channel name, select Save; to cancel the
E-30
Uniden 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 satisfied with the channel list, select Exit.
Maintenance and Troubleshooting
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:
xx If the antenna has been damaged, do not transmit except in an emergency situation.
Doing so may cause further radio damage.
xx You are responsible for continued FCC technical compliance of your radio.
xx Arrange for periodic performance checks with your Uniden dealer.
Common Questions
Problem
Things to Try
The radio won’t turn on.
Charge the radio.
-The power LED on the charger
doesn’t turn on.
----The radio won’t transmit.
I can’t hear anything from the
speaker.
Noise comes out of the
speaker all the time
I can transmit, but no one can
hear me.
I’m not getting hazard alerts.
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.
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.
Adjust the squelch level; it is probably too high.
Adjust the squelch level; it is probably too low.
Check your UIC channel settings: does the area you are in use different
channel assignments?
Make sure Weather Alert Watch is turned on.
The channel number on the display will flash if the radio is in a Watch mode
The display flashes, and I don’t
or in Scan mode. Try turning off scanning, Weather Alert Watch, Triple
know why.
Watch, or Dual Watch beginning on page E-10.
Where can I find my radio’s
The serial number is on a plate inside the battery compartment.
serial number?
Uniden MHS235 Radio Owner’s Manual
E-31
Specifications
General
All US/International/Canada marine channels
Channels
9 Weather channels
Freq. Control
PLL
Transmit: 1.5 PPM (at 77°F/25°C)
Freq. Tol.
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
6.29 (H) x 2.40 (W) x 1.61 (D) inch
Size (without antenna)
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
Double Conversion Super Heterodyne
Type
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-32
Uniden MHS235 Radio Owner’s Manual
Channels and Frequencies (MHz)
US channel frequencies and names
US Marine Channels
Ch
1A
5A
6
7A
8
9
10
11
12
13
14
15
16
17
18A
19A
20
20A
21A
22A
23A
24
25
26
27
28
63A
65A
66A
67
RX Freq
156.050
156.250
156.300
156.350
156.400
156.450
156.500
156.550
156.600
156.650
156.700
156.750
156.800
156.850
156.900
156.950
161.600
157.000
157.050
157.100
157.150
161.800
161.850
161.900
161.950
162.000
156.175
156.275
156.325
156.375
TX Freq
156.050
156.250
156.300
156.350
156.400
156.450
156.500
156.550
156.600
156.650
156.700
Inhibit
156.800
156.850
156.900
156.950
157.000
157.000
157.050
157.100
157.150
157.200
157.250
157.300
157.350
157.400
156.175
156.275
156.325
156.375
Status
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex, 1W
Simplex
Receive only
Simplex
Simplex, 1W
Simplex
Simplex
Duplex
Simplex
Simplex
Simplex
Simplex
Duplex
Duplex
Duplex
Duplex
Duplex
Simplex
Simplex
Simplex
Simplex, 1W
Name
Vessel traffic system/commercial
Vessel traffic system/commercial
Inter-ship safety
Commercial
Commercial
Non commercial
Commercial
Vessel traffic system
Vessel traffic system
Bridge to bridge
Vessel traffic system
Environmental
Distress, safety, and calling
Govt maritime control
Commercial
Commercial
Port operation
Port operation
Coast guard only
Coast guard
Coast guard only
Marine operator
Marine operator
Marine operator
Marine operator
Marine operator
Vessel traffic system
Port operation
Port operation
Bridge To Bridge
68
69
70
156.425
156.475
156.425
156.475
Simplex
Simplex
Non Commercial
Non Commercial
71
72
73
156.575
156.625
156.675
(156.5250)
(156.5250)
156.575
156.625
156.675
DSC Only
Simplex
Simplex
Simplex
DSC
Non Commercial
Non Commercial (Ship-Ship)
Port Operation
Uniden MHS235 Radio Owner’s Manual
E-33
US Marine Channels
Ch
74
75
76
77
78A
79A
80A
81A
82A
83A
84
85
86
87
88
RX Freq
156.725
156.775
156.825
156.875
156.925
156.975
157.025
157.075
157.125
157.175
161.825
161.875
161.925
157.375
157.425
TX Freq
156.725
156.775
156.825
156.875
156.925
156.975
157.025
157.075
157.125
157.175
157.225
157.275
157.325
157.375
157.425
Status
Simplex
Simplex, 1W
Simplex, 1W
Simplex, 1W
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Duplex
Duplex
Duplex
Simplex
Simplex
Name
Port Operation
Port Operation
Port Operation
Port Operation (Ship-Ship)
Non Commercial
Commercial
Commercial
Government
Government
Coast Guard
Marine Operator
Marine Operator
Marine Operator
Marine Operator
Commercial (Ship-Ship)
Canadian channel frequencies and names
Canadian Marine Channels
Ch
1
2
3
4A
5A
6
7A
8
9
10
11
12
13
14
15
16
17
18A
19A
20
21A
E-34
RX Freq
160.650
160.700
160.750
156.200
156.250
156.300
156.350
156.400
156.450
156.500
156.550
156.600
156.650
156.700
156.750
156.800
156.850
156.900
156.950
161.600
157.050
TX Freq
156.050
156.100
156.150
156.200
156.250
156.300
156.350
156.400
156.450
156.500
156.550
156.600
156.650
156.700
156.750
156.800
156.850
156.900
156.950
157.000
157.050
Status
Duplex
Duplex
Duplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex
Simplex, 1W
Simplex
Simplex, 1W
Simplex
Simplex, 1W
Simplex
Simplex
Duplex, 1W
Simplex
Name
Marine Operator
Marine Operator
Marine Operator
Canadian Coast Guard
Vessel Traffic System
Inter-Ship Safety
Commercial
Commercial
Boater Calling Channel
Commercial
Vessel Traffic System
Vessel Traffic System
Bridge To Bridge
Vessel Traffic System
Environmental
Distress, safety, calling
State Control
Commercial
Canadian Coast Guard
Port Operation
Canadian Coast Guard
Uniden MHS235 Radio Owner’s Manual
Canadian Marine Channels
Ch
22A
23
24
25
26
27
28
60
RX Freq
157.100
161.750
161.800
161.850
161.900
161.950
162.000
160.625
TX Freq
157.100
157.150
157.200
157.250
157.300
157.350
157.400
156.025
Status
Simplex
Duplex
Duplex
Duplex
Duplex
Duplex
Duplex
Duplex
Name
Canadian Coast Guard
Marine Operator
Marine Operator
Marine Operator
Marine Operator
Marine Operator
Marine Operator
Marine Operator
61A
62A
63A
64
64A
65A
66A
67
68
69
70
156.075
156.125
156.175
160.825
156.225
156.275
156.325
156.375
156.425
156.475
156.075
156.125
156.175
156.225
156.225
156.275
156.325
156.375
156.425
156.475
Simplex
Simplex
Simplex
Duplex
Simplex
Simplex
Simplex, 1W
Simplex
Simplex
Simplex
Canadian Coast Guard
Canadian Coast Guard
Port Operation
Marine Operator
Port Operation
Port Operation
Port Operation
Bridge To Bridge
Non Commercial
Non Commercial
71
72
73
74
75
76
77
78A
79A
80A
81A
82A
83
83A
84
85
86
87
88
156.575
156.625
156.675
156.725
156.775
156.825
156.875
156.925
156.975
157.025
157.075
157.125
161.775
157.175
161.825
161.875
161.925
157.375
157.425
(156.5250)
(156.5250)
156.575
156.625
156.675
156.725
156.775
156.825
156.875
156.925
156.975
157.025
157.075
157.125
157.175
157.175
157.225
157.275
157.325
157.375
157.425
DSC Only
Simplex
Simplex
Simplex
Simplex
Simplex, 1W
Simplex, 1W
Simplex, 1W
Simplex
Simplex
Simplex
Simplex
Simplex
Duplex
Simplex
Duplex
Duplex
Duplex
Simplex
Simplex
DSC
Non Commercial
Non Commercial
Port Operation
Port Operation
Port Operation
Port Operation
Port Operation
Inter Ship
Inter Ship
Inter Ship
Canadian Coast Guard
Canadian Coast Guard
Canadian Coast Guard
Canadian Coast Guard
Marine Operator
Marine Operator
Marine Operator
Port Operation
Port Operation
Uniden MHS235 Radio Owner’s Manual
E-35
International 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 traffic system
12
156.6000
156.6000
Simplex
Vessel traffic system
13
156.6500
156.6500
Simplex
Bridge to bridge
14
156.7000
156.7000
Simplex
Vessel traffic 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-36
Uniden 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
WX01
WX02
WX03
WX04
WX05
RX
162.5500
162.4000
162.4750
162.4250
162.4500
Channel
WX06
WX07
WX08
WX09
RX
162.5000
162.5250
161.6500
161.7750
Uniden MHS235 Radio Owner’s Manual
E-37
Regulations and Safety Warnings
WARNING! Read this information before using the radio.
Maritime Radio Services Operation
Warning! This transmitter will operate on channels/frequencies that have restricted use in the United 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 without 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 individuals requiring a license, such as commercial users, you should obtain a license application from your
nearest FCC field office (for US users) or Industry Canada (for Canadian users).
Basic Radio Guidelines
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 respond. 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 fines.)
FCC/Industry Canada Information
Certification: 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 modifications to this equipment may void compliance with the FCC Rules.
Any change or modification must be approved in writing by Uniden. Changes or modifications not
approved by Uniden could void the user’s authority to operate the equipment.
FCC RF Exposure Information
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 consistent 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-
E-38
Uniden 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, modifications, or attachments 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.
Body-Worn Operation
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 supplied 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.
Lithium Ion Battery Warning
This equipment contains a rechargeable Lithium Ion battery. The rechargeable Lithium Ion battery
contained in this equipment may explode if disposed of in a fire.
Do not short-circuit the battery.
Do not charge the rechargeable battery used in this equipment in any charger other than the one
specified in the owner’s manual. Using another charger may damage the battery or cause the battery 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 attention.
RBRC Information
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.)
Three Year Limited Warranty
WARRANTOR: UNIDEN AMERICA CORP. (“Uniden”)
ELEMENTS OF WARRANTY: Uniden warrants, for three years, to the original retail owner, this Uniden Product to be free from defects in materials and craftsmanship with only the limitations or exclusions set out below.
WARRANTY DURATION: This warranty to the original user shall terminate and be of no further effect 36 months after the date of original retail sale. The warranty is invalid if the Product is (A) dam-
Uniden MHS235 Radio Owner’s Manual
E-39
aged or not maintained as reasonable or necessary, (B) modified, altered, or used as part of any
conversion kits, subassemblies, or any configurations 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 WHATSOEVER, 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 REIMBURSEMENT 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 specific 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 instructions 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 traceable 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-40
Uniden MHS235 Radio Owner’s Manual
Uniden MHS235 Radio Owner’s Manual
E-41
QUESTIONS?
Visit our website at
www.uniden.com or
call 1-800-297-1023.
QUESTIONS?
Contactez-nous au
www.uniden.com ou
appelez 1-800-297-1023.
Printed in Vietnam
Imprimé au Vietnam
U01UT645AZZ(0)