COMDTINST 16121.1 JAN 29 1998
f.
All distress, urgent, and safety calls received by CAMS and Groups shall be forwarded
to the unit's respective Area or District Command Center for action. Other messages
(i.e., Weather Observations (OBS), AMVER messages, and Ice reports) will be
processed in accordance with current procedures.
g.
Many false distress alerts have occurred since the establishment of DSC. False alerts
are normally the result of accidental or incorrect use of DSC equipment and may divert
attention from a real distress. However, there are no DSC false alerts from the Coast
Guard watchstander's perspective. Each alert must be investigated.
h.
The proper method for stations or ships to cancel a false alert they initiated is outlined
below:
(1)
Stop the transmission immediately, switch to the associated voice frequency and
make an "all stations" broadcast. The broadcast should indicate the name,
callsign, MMSI number, and that the station is canceling the false alert sent
(quote distress text) with the date/time (UTC).
(2)
DSC Guard Frequencies, Voice Frequencies, and SITOR Frequencies:
DSC Guard Frequency
Voice Frequency
SITOR Frequency
156.525MHz
156.8MHz
N/A
2187.5 kHz
2182 kHz
2174.5 kHz
4207.5 kHz
4125 kHz
4177.5 kHz
6312.0 kHz
6215 kHz
6268 kHz
8414.5 kHz
8291 kHz
8376.5 kHz
12577.0 kHz
12290 kHz
12520 kHz
16804.5 kHz
16420 kHz
16695 kHz
i.
All DSC initiated calls addressed to the Coast Guard must be acknowledged. If the
Coast Guard is unable to provide the requested service (i.e., commercial message
processing), the originator will be notified that we are unable to comply and directed
elsewhere for service.
j.
Responding stations (CAMS and Groups) will use the MMSI of the remote site from
which they are transmiitting.
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