GMDSS系统船长遇险操作指南GMDSSoperatingguidanceformastersofshipsindistresssituations和YESNONOYESNOYESNOYESYESISIMMEDIATEHELPNEEDED?EMBARKINSURVIVALCRAFTWITHVHF,SARTANDIFPOSSIBLEEPIRBSWITCHONEPIRBANDSARTIMMEDIATELYANDLEAVEONISVESSELSINKINGORTOBEABANDONED?APOTENTIALPROBLEMEXISTSTRANSMITDISTRESSCALLBYHF/MF/VHSDSCORINMARSATRESPONSERECEIVED?COMMUNICATEONHF/MF/VHFORINMARSATTORCCANDSHIPSSWITCHONEPIRBANDSARTMANUALLYONBOARDNOTIFYRCCBYHF/MF/VHFDSCORINMARSATRESPONSERECEIVED?COMMUNICATEONHF/NF/VHFORINMARSATTORCCANDSHIPSTRANSMITDISTRESSCALLBYHF/MF/VHFDSCORINMARSAT