Garmin VHF 300 Owner's Manual - Page 25

Selecting the Channel for Individual Calls or Group Calls, Placing All-Ships Calls

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Digital Selective Calling Selecting the Channel for Individual Calls or Group Calls When placing an individual or group call, you can select from the following channels on which you want to communicate. The radio transmits this request with your call. • USA: 6, 8 ,9 ,10 ,13 ,16, 17, 67, 68, 69, 71, 72, 73, or 77 • Canadian and International: All of the channels listed previously, plus Channel 15 In most cases, the selection of a DSC channel is limited to those channels that are available in all frequency bands. When selecting the channel, select CUSTOM to select a different channel than the ones listed above. If you select a custom channel, be aware that the station you are calling may not be able to comply with the specified channel. Ensure that you select a channel that is appropriate for communication. 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 are used to broadcast significant navigational or weather-related information. • Urgency calls are used to communicate situations about the safety of a vessel or person when danger is not imminent. Discerning whether a situation warrants a distress call or an urgency call is the responsibility of the captain. To place an all-ships call: 1. Press the DSC key. 2. Select ALL SHIPS. 3. Select SAFETY or URGENCY to indicate the reason for your call. 4. Select CALL. The radio transmits the call on Channel 70 and then automatically switches to Channel 16. Placing Position Request Calls Position data received from stations that respond to position request calls is sent over the NMEA network, so that you can track the vessels on your Garmin chartplotter, for example. For more information on NMEA 0183 and NMEA 2000, see page 29. 1. Press the DSC key. 2. Select POS. REQUEST. 3. Select from the following options to select the place from which the MMSI number is retrieved: • MANUAL-a screen is displayed that gives you the ability to enter the MMSI number manually. Select a number and move to the next character. When you have entered the correct MMSI number, select ACCEPT. • DIRECTORY-the directory is displayed. Select an entry. VHF 300 Series Owner's Manual 19

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VHF 300 Series Owner’s Manual
±9
Digital Selective Calling
Selecting the Channel for Individual Calls or Group Calls
When placing an individual or group call, you can select from the following channels on
which you want to communicate. The radio transmits this request with your call.
USA:
6, 8 ,9 ,10 ,13 ,16, 17, 67, 68, 69, 71, 72, 73, or 77
Canadian and International:
All of the channels listed previously, plus Channel 15
In most cases, the selection of a DSC channel is limited to those channels that are available
in all frequency bands. When selecting the channel, select
CUSTOM
to select a different
channel than the ones listed above. If you select a custom channel, be aware that the station
you are calling may not be able to comply with the specified channel. Ensure that you select
a channel that is appropriate for communication.
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 are used to broadcast significant navigational or weather-related information.
Urgency calls are used to communicate situations about the safety of a vessel or person
when danger is not imminent. Discerning whether a situation warrants a distress call or
an urgency call is the responsibility of the captain.
To place an all-ships call:
1. Press the
DSC
key.
2. Select
ALL SHIPS
.
3. Select
SAFETY
or
URGENCY
to indicate the reason for your call.
4. Select
CALL
. The radio transmits the call on Channel 70 and then automatically
switches to Channel 16.
Placing Position Request Calls
Position data received from stations that respond to position request calls is sent over the
NMEA network, so that you can track the vessels on your Garmin chartplotter, for example.
For more information on NMEA 0183 and NMEA 2000, see
page 29
.
1. Press the
DSC
key.
2. Select
POS. REQUEST
.
3. Select from the following options to select the place from which the MMSI number is
retrieved:
MANUAL
—a screen is displayed that gives you the ability to enter the MMSI number
manually. Select a number and move to the next character. When you have entered
the correct MMSI number, select
ACCEPT
.
DIRECTORY
—the directory is displayed. Select an entry.
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