Distress alert and the frequencies to use
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 for the purpose:
VHF Channel 70
MF 2187.5 kHz
HF 4207.5 kHz
HF 6312kHz
HF 8414.5 kHz
HF 12577 kHz
HF 16804.5 kHz
The distress alert should indicate:
· on which frequency the follow-up distress message will be transmitted; and
· the mode of transmission (telephony or telex).
The frequencies that should be used for the follow-up distress message:
Radio Telephone (RIf) Ch.16 VHF
2182 kHz
4125 kHz
6215 kHz
8291 kHz
12290 kHz
16420 kHz
Radio Telex
2174.5 kHz 4177.5 kHz 6268 kHz 8376.5 kHz 12520 kHz 16695 kHz
Satellite radiocommunication
The distress alert by satellite should be transmitted. with absolute priority, to a Rescue Co-ordination Centre (RCC).
