The GMDSS radio equipment requirements are categorized as following:General Sea area A1 Sea areas A1 and A2 Sea areas A1, A2 and A3 Sea areas A1, A2, A3 and A4 Radio equipment: GeneralEvery ship shall be provided with:VHF radio capable of transmitting and receiving:-DSC on the frequency 156.525 MHz (channel 70) and maintain a continuous watch on the same -Radiotelephony on the frequencies 156.300 MHz (channel 6), 156.650 MHz (channel 13) and 156.800 MHz (channel 16);A search and rescue locating device (SART) capable of operating either … [Read more...]
ANNEX IV – Distress Signals
1. Need of Assistance The following signals, used or exhibited either together or separately, indicate distress and need of assistance:(a) a gun or other explosive signal fired at intervals of about a minute;(b) a continuous sounding with any fog-signalling apparatus;(c) rockets or shells, throwing red stars fired one at a time at short intervals;(d) a signal made by any signalling method consisting of the group ... --- ... (SOS) in the Morse Code;(e) a signal sent by radiotelephony consisting of the spoken word "Mayday";(f) the International Code Signal of distress … [Read more...]
GMDSS Watches to maintain at sea
In compliance with SOLAS Ch IV, Regulation 12 Every Ship While at sea maintain a continuous watch (GMDSS): 1. Ships complying with regulations under area A1 : on VHF DSC channel 702. Ships complying with regulations under area A2 and A3 : on the distress and safety DSC frequency 2,187.5 kHz3. Ships complying with regulations under area A3 and A4 : on the distress and safety DSC frequencies 2,187.5 kHz and 8,414.5 kHz and also on at least one of the distress and safety DSC frequencies 4,207.5 kHz, 6,312 kHz, 12,577 kHz or 16,804.5 kHz.4. Ships complying with regulations under … [Read more...]