<Dl> <Dd> (i) VHF channel 70, or </Dd> <Dd> (ii) MF / HF on the frequencies 2187.5 kHz, 8414.5 kHz, 4207.5 kHz, 6312 kHz, 12577 kHz or 16804.5 kHz; </Dd> </Dl> <Dd> (i) VHF channel 70, or </Dd> <Dd> (ii) MF / HF on the frequencies 2187.5 kHz, 8414.5 kHz, 4207.5 kHz, 6312 kHz, 12577 kHz or 16804.5 kHz; </Dd> <Dd> (m) a ship - to - shore distress alert transmitted by the ship's Inmarsat or other mobile satellite service provider ship earth station; (see GMDSS) </Dd>

The international regulations for preventing collisions at sea 1972