Placing Group Calls
Before you can place a call to a group, you must enter the MMSI number of the group into the directory (
).
You can contact a group of specific vessels, such as a sailing club or flotilla, by making a group call.
1 Select DSC > GROUP > CALL.
2 Select a saved group.
3 Select a channel (
Individual Call or Group Call Channels, page 13
).
The radio transmits the channel request with your call.
4 Select CALL.
The radio transmits the call on channel 70, then changes to the selected channel.
Placing All-Ships Calls
All-ships calls are transmitted to all stations within receiving distance of your radio. You can make two types of
all-ships calls. Safety calls broadcast significant navigational or weather-related information. Urgency calls
communicate situations about the safety of a vessel or person when danger is not imminent. The captain
should discern whether a situation warrants a safety call or an urgency call.
1 Select DSC > ALL SHIPS.
2 Select SAFETY or URGENCY.
3 Select a channel (
Individual Call or Group Call Channels, page 13
).
The radio transmits the channel request with your call.
4 Select CALL.
The radio transmits the call on channel 70, then changes to the selected channel.
Individual Call or Group Call Channels
When placing an individual or group call, you should select from designated DSC channels. The radio transmits
this request with your call.
• USA: channels 6, 8, 9, 10, 13, 17, 67, 68, 69, 71, 72, 73, and 77.
• Canada and International: all USA channels, plus channel 15
DSC channels are limited to channels that are available in all frequency bands. You can select CUSTOM to
select a channel that is not listed. If you select a custom channel, the station you are calling may not be able to
comply with the specified channel. You should select a channel that is appropriate for communication.
Requesting a Vessel's Position
Position data received from stations that respond to position request calls is sent over the NMEA
®
network. You
can track the vessels on your Garmin chartplotter.
1 Select DSC > POS. REQUEST.
2 Select an option:
• To enter the MMSI number manually, select MANUAL, enter the MMSI number, and select ACCEPT.
• To select an entry from the directory, select DIRECTORY, and select an entry.
3 Select CALL.
The radio transmits the call on channel 70 and returns to the previous channel. WAITING FOR
ACKNOWLEDGE appears on the screen.
Digital Selective Calling
13
