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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 trafc.
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
briey checks for activity on a specic channel, then returns
to its previous operation.
Watch mode What it does To turn it on/off
Weather Alert
Watch
Checks the last-used weather
channel for hazard alerts
every 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.