E-31
Uniden MHS135 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 MMSL.
Any time you want to
talk to another station.
Group
Calls all the stations that have
the same Group MMSL as
yours.
Any time you want 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:
x
Throughout the race, you use group calling to update
the racers on the time, race status, and any course
corrections.
x
A power boat full of spectators comes a little too close to
the race path. You use individual calling to contact the
power boat and advise them to stay clear of the race.
x
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.