Making Dsc Calls - Uniden MHS245 Owner's Manual

Using DSC Features

Making DSC Calls

There are essentially four different types of DSC voice calls:
Call Type
Distress
Individual
Group
All Ships
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:
• Throughout the race,
you use group calling to
update the racers on the
time, race status, and any
course corrections.
• A power boat full of
spectators comes too
close to the race path.
You use individual calling
to contact the power boat
and advise them to stay
clear of the race.
• 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.
UNIDEN MHS245
What it does
Alerts all stations that
you need assistance and
sends them your current
position.
Calls a single station
using the User MMSI.
Calls all the stations that
have the same Group
MMSI as yours.
Calls all stations within
range of your radio.
All ships call
When to use it
In an emergency only.
When you want to talk to
another station.
Any time you want to talk
with the whole group you
are traveling with at the
same time.
Safety warnings (e.g.,
debris in the water) or any
urgent situation.
Individual
call
36
Handheld VHF Marine Transceiver
All ships call
Group
call