Using Digital Selective Calling (DSC) Features
30
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 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.
•
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.
Calling a single station
(Individual Call)
To call a single station with DSC, follow the steps below:
Press the
1.
MENU-PA
button to display the menu.
Choose the
2.
DSC Call
sub-menu, then select
Individual.
The radio displays the names listed in your directory; use
3.
CHANNEL UP
and
CHANNEL DOWN
buttons to highlight the directory entry you want to
call and press the
SELECT
button.
If you want to call a station that is not in your directory, select
Manual
.
The radio prompts you to enter the MMSI number you want to call.
Enter the MMSI number the same way you enter directory entries (see
page 27) Enter all nine digits and press the
SELECT
button.
The radio prompts you to select a response channel. Use
4.
CHANNEL UP
and
CHANNEL DOWN
buttons to scroll through the available channels.
When you reach the channel you want to use for a response, press the
SELECT
button.
The radio displays the MMSI number you are about to call and asks
5.
you to confirm. If you want to call the displayed MMSI number, select
Send
. To cancel the call, select
Cancel
.
The radio automatically switches to channel 70 to transmit the call
6.
request.
UM425 VHF OM.indd 30
28/9/11 11:55:17 AM
