Mystic OMc.book Page 23 Wednesday, August 13, 2003 5:26 PM
Advanced VHF Radio Operations
Digital Selective Calling (DSC)
Digital Selective Calling has been chosen by the International Maritime
Organization (IMO) as an international standard for establishing VHF, MF
and HF radio calls. Digital Selective Calling has also been selected as part
of the Global Maritime Distress and Safety System (GMDSS). This service
will let you instantly send a Distress call with GPS position to the US
Coast Guard and other vessels within range of the transmission.
DSC will also let you initiate or receive distress, urgency, safety, position
information and routine calls to or from another vessel outfitted with a
DSC transceiver. See the Setup Section (page 40) for instructions on how
to setup the directory of names.
To make a DSC Call, press [CALL/LIGHT]. That takes you to the D S C
M e n u . From there you can select several different Calls you can make:
Individual Call, Group Call, All Ships Call, Position Request, Position
Send, Standby,and Call Wait. They are described in the paragraphs
1. Select an open (unused) working Channel.
2. Press [CALL/LIGHT].
3. At the D S C M e n u , use p and q to select I n d i v i d u a l C a l l .
4. At the I n d i v i d u a l C a l l screen, use p and q to select the
individual from the Directory.
Note: You must have entries in your directory to make an Individual
Call. See the Setup Section (page23.)
5. Press [ENTER]. You will see the A t t e n t i o n screen. Use t or u to
select Y e s and press [ENTER] to make the call. Or, select N o and
press [ENTER] to cancel the call.
Note: If you select No, you'll be returned to the I n d i v i d u a l C a l l
6. When you receive the individual acknowledgment successfully,
the following screen appears, and both radios tune to the
previously selected channel. You are now ready to transmit on
- or -