Uniden MHS75 User manual

MHS75
RADIO VHF MARITIME
GUIDE D’UTILISATION
VHF MARINE RADIO
OWNER’S MANUAL

Making a Distress Call
Speak slowly -- clearly -- calmly.
Make sure your radio is on.1.
Press the2. 16/9-Tri button to switch to Channel 16 (156.800
MHz). (If the corner of the display does not show 16, press
the 16/9-Tri button again until it does.)
Press the3. Push to talk button and say,
“MAYDAY --MAYDAY-- MAYDAY.”
Say,4. “THIS IS {name or call sign of your boat}.”
Say,5. “MAYDAY{name or call sign of your boat}.”
Tell where you are (what navigational aids or land-marks6.
are near, or give your position from a GPS).
State the nature of your distress (e.g. sinking, medical7.
emergency, man overboard, re, adrift, etc.).
Give the number of persons aboard and describe the8.
condition of any injured persons.
Estimate present seaworthiness of your ship (e.g. how9.
immediate is the danger due to ooding or re or proximity
to shore).
Briey describe your ship (length, type, color, hull). 10.
Say,11. “I WILL BE LISTENING ON CHANNEL 16.”
End message by saying,12. “THIS IS {name or call sign of your boat} OVER.”
Release the13. Push to talk button and listen for a response.
If you do not get an answer after 30 seconds, repeat
your call, beginning at step 3, above.
For future reference, write your boat’s name & call sign here:

Faire un appel de détresse
Parlez lentement – clairement – calmement.
Vériez si votre radio est en marche. 1.
Appuyez sur la touche2. 16/9-Tri an de commuter au canal
16 (156,800 MHz). (Si le canal 16 n’apparaît pas dans
le coin de l’afchage, appuyez de nouveau sur 16/9-Tri
jusqu’à ce qu’il soit afché.)
Appuyez sur le bouton3. Push to talk et dites : “MAYDAY –
MAYDAY – MAYDAY”.
Donnez l’identité de votre navire en disant :4. “ICI {nom ou
indicatif d’appel de votre bateau}.”
Dites :5. “MAYDAY {nom ou indicatif d’appel de votre
bateau}.”
Donnez votre emplacement : (quels sont les points de6.
repère se trouvant près de vous ou lisez les coordonnées
de longitude et de latitude apparaissant sur votre dispositif
GPS).
Révélez la nature de votre détresse, par exemple, êtes-7.
vous en train de couler, est-ce une urgence médicale, y
a-t-il un homme à la mer, êtes-vous aux prises avec un
incendie, êtes-vous à la dérive, etc.?
Donnez le nombre de personnes à bord et les conditions8.
des blessés, s’il y en a.
Donnez la condition de navigabilité actuelle de votre9.
navire, quel est le degré de l’urgence par rapport à
l’inondation, à l’incendie ou à votre proximité de la côte?
Donnez une brève description de votre navire (métrage,10.
type, couleur, coque).
Dites :11. “JE VAIS ÉCOUTER SUR LE CANAL 16”.
Terminez le message en disant12. “ICI {nom ou indicatif
d’appel de votre bateau} À VOUS.”
Relâchez le bouton13. Push to talk et écoutez.
Si vous n’obtenez pas de réponse après 30 secondes,
répétez l’appel en commençant à l’étape 3 ci-dessus.
Pour toute référence ultérieure, transcrivez ci-dessous le nom
et l’indicatif d’appel de votre bateau :

Uniden MHS75 Radio Owner’s Manual
Table of Contents
Introduction................................ E-1
Features ...................................... E-1
Getting Started........................... E-2
What’s included ........................... E-2
Parts of the MHS75 ..................... E-3
Front view................................... E-3
Back view................................... E-3
DC Charger................................ E-4
Reading the display..................... E-5
Display icons and what they
mean...................................... E-5
How It Works.............................. E-6
Normal mode operation............... E-7
Normal mode with Weather Alert
Watch..................................... E-7
Normal mode with Triple Watch or
Dual Watch............................. E-8
Normal mode with Quad Watch . E-8
Scan mode operation .................. E-9
Using the radio in scan mode .... E-9
Scan mode with Weather Alert
Watch................................... E-10
Scan mode with Triple Watch or
Dual Watch........................... E-10
Both Weather Alert and Triple/Dual
Watch in scan mode............. E-10
Weather mode............................E-11
Using the radio in weather
mode.....................................E-11
Weather mode with Weather Alert
Watch....................................E-11
Weather mode with Triple Watch
or Dual Watch ...................... E-12
Setting Up the Hardware......... E-12
Attaching the antenna................ E-12
Installing the battery .................. E-12
Charging the battery.................. E-13
Connecting the charger............ E-13
Important notes on charging the
battery.................................. E-13
Disconnecting the charger ....... E-14
Attaching the belt clip ................ E-14
Using Your Radio..................... E-15
Changing the volume ................ E-15
Setting the squelch level............ E-15
Changing the channel................ E-15
Making a transmission............... E-16
Boosting the transmission
power ................................... E-16
Setting the UIC channel mode... E-17
Maintenance and
Troubleshooting.................... E-17
Common questions.................... E-17
Specications .......................... E-18
Channels and Frequencies........ E-19
US channel frequencies and
names .................................. E-19
Canadian channel frequencies and
names .................................. E-21
International channel frequencies
and names ........................... E-23
Weather channel frequencies and
names .................................. E-25
Regulations and Safety
Warnings................................ E-26
Maritime radio services
operation................................. E-26
Basic radio guidelines................ E-26
FCC/Industry Canada
information.............................. E-27
FCC RF exposure information... E-27
Lithium ion battery warning........ E-28
Three Year Limited Warranty
Statement .............................. E-29
Making a Distress
Call ................ (inside front cover)

E-1
Uniden MHS75 Radio Owner’s Manual
Introduction
Features
The MHS75 provides the following key features:
Submersible design•
Complies with JIS8/IPX8 water-resistant standards, which
means the radio can be submerged in 1.5 meters of water
for 30 minutes without damage.
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 1 Watt to 2.5 or
5 Watts for added transmission distance.
Battery level display and low battery alert• .
Dual, Triple and Quad 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
National Oceanic and Atmospheric Administration• (NOAA) weather channel watch
Sounds a warning tone when a hazard alert is issued.

E-2 Uniden MHS75 Radio Owner’s Manual
Getting Started
What’s included
MHS75 Radio Antenna
DC Charger Lithium Ion Battery
Belt Clip Wrist Strap
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.

E-3
Uniden MHS75 Radio Owner’s Manual
Parts of the MHS75
Front view
Back view
Antenna
LCD display
1/5W-2.5W
button
Channel up
button
Volume-power
knob
(Turn clockwise
to increase
volume.)
Microphone
16/9-Tri
(16/9- triple
watch) button
WX-Alert
(weather-alert)
button
Scan-Dual
(scan-dual
watch) button
Squelch knob
(Turn clockwise to
decrease channel
noise.)
Push to talk
button
Speaker
Wrist strap
anchor
Channel down
button
UIC-Lock button
Mem (memory)
button
Belt clip
Battery
Battery charging
contacts
Battery
latch

E-4 Uniden MHS75 Radio Owner’s Manual
Knob Turn clockwise to...: Turn counter-clockwise to...:
Volume-
Power
Turn on the radio or
increase the volume. Decrease the volume or turn off the radio.
Squelch Raise the squelch level
to reduce channel noise. Lower the squelch level to hear weaker signals.
Button Press to... Press and hold to...
Push to talk NA Transmit on a channel
16/9-Tri
1st press: Go to channel 16.
2nd press: Go to channel 9.
3rd press: Go back to the
starting channel.
Turn Triple Watch on and
off.
Mem
Save a channel into memory
or delete a channel from
memory. NA
UIC-Lock Switch from US to Canadian
or international channels. Lock the keys; press and hold again to unlock.
Channel Up Move up one channel at a
time. Move quickly up the channels.
Channel
Down
Move down one channel at
a time. Move quickly down the channels.
WX-Alert Listen to the weather
channels. Turn Weather Alert Watch on and off.
Scan-Dual Start scanning the channels
saved in memory. Turn Dual Watch on and off.
1/5W-2.5W Switch the transmit power
between 1 Watt and 5 Watts. Change the transmit power to 2.5 Watts.
DC Charger
Battery charging contacts
Release tabs
12 V DC (”cigarette
lighter”) plug
Power LED

E-5
Uniden MHS75 Radio Owner’s Manual
Reading the display
The LCD display
shows different
information
depending on
what you are
doing. This
sample screen
shows some of
this information.
The table below
shows all the
possible icons
and what they
mean.
Display icons and what they mean
Icon What it means
You are currently transmitting.
, , or The transmitter power is set to 1 Watt, 5 Watts, or
2.5 Watts.
The keys are locked.
, , or The radio is set to use US channels, CANadian
channels, or INTernational channels.
or TRIple Watch or DUAL Watch is turned on.
The current channel is saved in memory.
The radio is in Scan mode.
The radio is in Weather Mode
Weather Alert Watch is turned on.
The battery is fully charged, mostly charged, half
charged, mostly empty, or completely empty.
88
Transmit
power level
(1, 2.5, or 5
Watts) This channel is stored in
memory.
Triple
Watch is
on
The radio
is in scan
mode
Key lock
is on
The radio is
transmitting Current
channel
number
UIC channel mode
(USA, CANada, or
INTernational)
Weather
Alert Watch
is on.
Battery
status icon

E-6 Uniden MHS75 Radio Owner’s Manual
How It Works
The MHS75 radio has three main operation modes: normal
mode, scan mode, and weather mode.
Mode What it does Use it when you
want to...: To turn it on/off
Normal
mode
Monitors a single marine
channel and lets you talk
on that channel.
Monitor a channel or
talk to another radio. (default mode)
Scan
mode Monitors all the channels you save into memory.
Check a small group
of regularly-used
channels for trafc.
Press Scan-
Dual.
Weather
mode Monitor the selected NOAA weather channel.
You want to hear the
current or forecasted
weather.
Press WX-
Alert.
In addition to the three operation modes, the MHS75
provides four different watch modes which you can activate
during any operation mode. In the watch modes, the radio
briey checks for activity on a specic 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 7 seconds.
Press and hold WX-Alert
for 2 seconds.
Dual Watch Checks channel 16 for activity
every 2 seconds. Press and hold Scan- Dual for 2 seconds.
Triple Watch Checks channels 16 and 9 for
activity every 2 seconds. Press and hold 16/9-Tri for 2 seconds.
Quad Watch
Checks channels 16 and 9 for
activity every 2 seconds, and
checks the last-used weather
channel every 7 seconds.
Turn on Triple Watch,
then turn on Weather
Alert Watch.
Note: Private boats must monitor channel 16 when-
ever they are underway. Water-going vessels should
have either Triple Watch or Dual Watch on at all times.

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Uniden MHS75 Radio Owner’s Manual
Normal mode operation
To transmit, remove the radio from the charger, then press•
and hold the Push to Talk button. Release the button
when you are nished talking.
For the best sound quality, hold the microphone about two•
inches from your mouth while you’re talking.
Press the• Channel Up button to move up one channel at
a time. Press and hold the button to scroll quickly up the
channels.
Press the• Channel Down button 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 the• 1/5W-2.5W
button. The transmit power switches between 1 Watt and 5
Watts each time you press the 1/5W-2.5W button.
To change the transmit power to 2.5 Watts, press and•
hold the 1/5W-2.5W button for 2 seconds. Press and hold
the button again to change back to the previous transmit
power (either 1 Watt or 5 Watts).
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.)
wx
Every 7 seconds,
the radio checks
the last-used
weather channel.
WX Alert
Watch on
Monitoring Channel 25

E-8 Uniden MHS75 Radio Owner’s Manual
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 two 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.
Normal mode with Quad Watch
You can activate Weather Alert Watch and Triple Watch at
the same time to monitor four channels at once (Quad
Watch). The radio performs the Triple Watch and Weather
Alert Watch checks at their scheduled time:
09 16 09 16 09 16
Every 2 seconds, the radio
checks channels 9 & 16.
Triple Watch on
Monitoring Channel 25
wx
Every 7 seconds,
the radio checks
the last-used
weather channel.
WX Alert
Watch on
09 16 09 16 09 16
Every 2 seconds, the radio
checks channels 9 & 16.
Triple Watch on
Monitoring Channel 25

E-9
Uniden MHS75 Radio Owner’s Manual
Scan mode operation
You can save 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
To activate scan mode, press• Scan-Dual.
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 the Mem button. The Mem icon shows on the display
whenever you tune to that channel.
To remove a channel from memory, set the radio to that•
channel, then press the Mem button. The Mem icon no
longer shows on the display.
When the radio stays on a channel, press• Channel Up to
leave that channel and resume scanning.
To end the scan, press the• Scan-Dual button again; the
radio remains on the last scanned channel.
11
1008 1312 14 17
15
The radio scans about
5 channels in 0.5 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-10 Uniden MHS75 Radio Owner’s Manual
Scan mode with Weather Alert Watch
If you activate Weather Alert Watch while in scan mode, the
radio checks the most recently-used weather channel every
seven seconds, then continues scanning the next channel in
memory:
Scan mode with Triple Watch or Dual Watch
If you activate Triple Watch while operating in scan mode,
the radio checks channels 16 and 9 every two seconds, then
goes on to scan the next channel; with Dual Watch turned
on, the radio only checks channel 16:
Both Weather Alert and Triple/Dual Watch in scan mode
You can activate Weather Alert Watch and Triple/Dual Watch
at the same time. The radio performs both checks at their
scheduled time:
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
9 & 16, then scans
the next channel.
Triple
Watch on
Memory Channel Scan
08 252417151413121110 20

E-11
Uniden MHS75 Radio Owner’s Manual
Weather mode
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 ten NOAA weather channels. If any type
of alert is received, the radio sounds an alert tone and the
display blinks.
Using the radio in weather mode
You cannot transmit while in weather mode.•
To enter weather mode, press the• WX-Alert button.
To turn off the radio’s alert tone, press any button.•
To cancel weather mode and return to the previous marine•
channel, press the WX-Alert button again.
Weather mode with Weather Alert Watch
Because weather mode already monitors the weather
channels, you don’t need Weather Alert Watch to check
the weather channel every seven seconds. If you activate
Weather Alert Watch while operating in weather mode,
it operates as a type of “sleep mode”: the radio stays on
the weather channel and 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.
09 16
Every 2 seconds, the
radio checks channels
9 & 16, 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

E-12 Uniden MHS75 Radio Owner’s Manual
Weather mode with Triple Watch or Dual Watch
If you activate Triple
Watch while operating
in weather mode, the
radio checks channels
16 and 9 every two
seconds; with Dual
Watch turned on, the
radio only checks
channel 16.
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 MHS75 comes with a rechargeable Lithium Ion battery;
for shipping safety, the battery is not installed at the factory.
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).
09 16 09 16 09 16
Every 2 seconds, the radio checks
channel 9, then channel 16
with Triple Watch on
Monitoring Weather Channel WX08
Rubber
seal

E-13
Uniden MHS75 Radio Owner’s Manual
2. Lower the battery until it rests
at in the compartment.
Bring the battery latch up and3.
snap it into place.
Charging the battery
Connecting the charger
Align the charger with the
battery (on the rear side
of the radio). Slide the
radio into the charger
until it clicks into place.
Connect the other end
of the charger to any standard 12 volt DC “cigarette lighter”
style outlet. The power LED on the top of the plug should
turn orange and remain lit.
CAUTION: If the LED blinks, immediately disconnect
the charger from the DC outlet. Reseat the radio in the
charger before reconnecting the charger to power.
CAUTION: 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 re or shock.
Important notes on charging the battery
Charge the battery fully before using the radio.•
When the battery is completely charged, the power LED•
turns green.
Don’t use the charger when the ambient temperature is•
below 0º C (32º F) or above 45º C (113º F).
If the radio is powered down, the battery can charge in•
about three and a half hours. (If the radio is powered on,
the battery takes longer to charge.)
If the battery is empty, the radio can’t transmit, even if it’s•
in the charger.

E-14 Uniden MHS75 Radio Owner’s Manual
Be careful moving the charger cord. If you have to move•
the cord while the radio is charging, pick up the radio rst
so you don’t drop it.
Disconnecting the charger
Squeeze in on the release tabs
at the base of the charger, and
slide the radio out.
Attaching the belt clip
To attach the belt clip:
Rotate the belt clip so that the1.
nger indentation is towards the
top of the radio.
Align the center of the clip with2.
the anchor post.
Place the clip on the post3.
and slide the clip upwards
until it clicks into place.
To remove the belt clip:
Rotate the clip so that1.
the nger indentation is
towards the bottom of the radio.
Slide the clip up until it comes free of the anchor post.2.

E-15
Uniden MHS75 Radio Owner’s Manual
Using Your Radio
Changing the volume
To increase the speaker volume, turn the Volume-Power
knob clockwise; turn it counter-clockwise to decrease the
volume.
Setting the squelch level
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, adjust the SQUELCH knob until
the noise is ltered and you can hear only the transmission.
If you switch to a channel with a lot of noise or a weak trans-
mission, you may need to readjust the squelch level again.
Note: Setting the squelch level too high may prevent
you from hearing weaker transmissions. If you are
having difculty hearing a transmission, try setting the
squelch level lower.
Changing the channel
Press the Channel Up and Channel Down buttons briey to
scroll through the channels one channel at a time. Press and
hold the Channel Up or Channel Down button to quickly
scroll through the channels.
Weak signals
No
Squelch
Medium
Squelch
High
Squelch
Strong signals
Noise

E-16 Uniden MHS75 Radio Owner’s Manual
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.
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.
For the best sound quality, hold the microphone about two•
inches away from your mouth.
See the channel lists starting on page• 19 for a list of
receive-only channels.
Boosting the transmission power
In most situations, the 1 Watt 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 boost the
transmission power from 1 Watt to 2.5 Watts or 5 Watts:
Press the• 1/5W-2.5W button to switch from 1 Watt to 5
Watts. Press the button again to switch back to 1 Watt.
To switch to 2.5 Watts, press and hold the• 1/5W-2.5W
button for about two seconds. Press and hold the button
again to switch back to 1 Watt or 5 Watts (whichever you
were on when you switched to 2.5 Watts).
The transmit power remains at the new setting until you•
change it again. The transmit power icon always shows the
current transmission power.
Note: Don’t forget to change the transmission setting
back to 1 Watt when you move close to other stations.
Some channels (for example, channels 13 and 67) limit•
the transmission power to 1 Watt. When you tune to a
limited-power channel, the radio automatically switches to
1 Watt. See the channel lists starting on page 19 for a list
of power-restricted channels.