RD68 VHF
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E03912 Issue 2.0
5.1.3 Cancelling a Distress Alert
If a DSC Distress Alert is sent accidentally, cancel it immediate-
ly on the RD68 by pressing the C button to prevent repeats, then
make the following announcement on channel 16:
“This is (name of vessel, callsign, MMSI)”
“Cancel DSC Alert sent (date & time UTC)”
“Over.”
DO NOT simply cancel the DSC alert without verbally cancel-
ing it as well, otherwise the rescue authorities will not be aware
that this is a false alarm.
5.1.4 Alerting all vessels within range
If the vessel is outside of coast radio range and needs to issue a
safety warning to all vessels within radio range, transmit an All
Ships Safety call by DSC. After about 15 seconds transmit on
channel 16 the safety call and message as follows:
“Securité, Securité, Securité”
“All stations (or called station – repeat three times)”
“This is (MMSI and name or callsign of own vessel –
repeat text of safety message) – Over.”
5.1.5 Calling a coast radio station
Enter the MMSI of the station into the RD68, either manually,
or from the directory. When the call is acknowledged, the work-
ing channel for voice communication will be indicated and the
RD68 will automatically switch to that channel. Make a voice
call as normal.
5.1.6 Making an intership call
Enter the vessel’s MMSI into the RD68, either manually, or
from the directory. Before sending the call, enter the intership
channel to be used for subsequent communication. When the
alarm sounds on the called vessel, its operator should acknowl-
edge by DSC, then respond by voice on the selected channel.
If the MMSI number of the vessel is not known, call as now on
channel 16. If no response is received, call on channel 13 (this
is the GMDSS bridge-to-bridge communication channel).
5.2 NMEA sentences received
The following NMEA0183 sentences are processed by the
RD68 in order to transmit the boat’s position when a Distress
Alert is initiated:
NMEA version 2.0 – GGA, GLL, RMC.
