8/18/2019 A6 Distress alert and the frequencies to use.pdf
1/1
Terrestrial radiocommunication
The distress alert may be sent using digital selective calling
(DSC) on one or more of the following
frequencies which are dedicated exclusively to the purpose:
VHF Channel 70
MF 2187.5 kHz
HF 4207.5 kHz
HF 6312 kHz
HF 8414.5 kHz
HF 12577 kHz
HF 16804.5 kHz
The distress alert should indicate:
o on which frequency the follow-up distress message will
be transmitted;
and
o the mode of transmission (telephony or telex).
The frequencies that should be used for the follow-up distress
message:
Radio Telephone (R/T) Radio Telex
Channel 16 VHF
2182 kHz 2174.5 kHz
4125 kHz 4177.5 kHz
6215 kHz 6268 kHz
8291 kHz 8376.5 kHz
12290 kHz 12520 kHz
16420 kHz 16695 kHz
Satellite radiocommunication
The distress alert by satellite should be transmitted, with
absolute priority,
to a Rescue Co-ordination Centre (RCC).
84 Bridge procedures guide
A6 Distress alert and the frequencies to use
