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How It Works
NOTE: You are required to monitor channel 16 whenever your boat is under-
way. You should have either Triple Watch or Dual Watch on at all times.
In addition to the two main operation modes, the UM425 also provides two differ-
ent “watch” modes which you can activate during any of the two basic modes. In
the watch modes, the radio briey checks for activity on a specic channel, then
returns to its previous mode.
Normal mode operation
Normal mode monitors whatever channel you select, and you can transmit on
that channel also.
While using normal mode, the display lets you see the following information
(not all indicators will display at the same time):
25
Marine Operator
25 Watts INT
Memory
GPS Data OK
Transmit power
(1 W or 25 W)
Current channel
is stored in
memory
Status messages
(see the status
message table)
Current
channel
number
Current channel
name (if the name
is too long, the
name line scrolls)
Channel mode
(USA, CANadian,
or INTernational)
Watch mode What it does: Use it when: To turn it on/off:
Triple Watch Checks for activity
on channels 16
and 9 every two
seconds.
You want to monitor
a channel yet
maintain a watch on
channels 16 and 9.
Press and hold the
16/9-TRI button for
two seconds.
Dual Watch Checks for activity
on channel 16 every
two seconds.
You want to monitor
a channel yet
maintain a watch on
channel 16.
Change Triple
Watch to Dual
Watch in the setup
menu, then press
and hold the
16/9-
TRI button for two
seconds.
UM425 VHF OM.indd 13 28/9/11 11:55:15 AM