8
Uniden MHS450 Radio Owner’s Manual
How It Works
The MHS450 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 traffic
Press
SCAN-
MEM
.
Weather
mode
Monitor the selected
NOAA weather channel.
You want to hear the
current or forecasted
weather in your area
Press
WX-
ALERT
.
In addition to the three operation modes, the MHS450
provides three 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 7 seconds
Press and hold
WX-ALERT
for 2 seconds
Triple Watch
Checks channels 16 and 9
for activity every 2 seconds
Press and hold
16/9-TRI
for two seconds
Dual Watch
Checks channel 16 for
activity every 2 seconds
Change Triple Watch to
Dual Watch in the menu,
then press and hold
16/9-
TRI
for 2 seconds
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.
