distress signal
Số nhiều: distress signals
Từ liên quan
SOSmaydayflareemergencyrescuedangeralarmbeaconsurvivalhazardcrisishelpcommunicationradiotransmittersatellitefrequencycoast guardlifeboatshipwreckcrashaccidentdisastercatastrophestrandedlostwildernessoceanseaaviationmaritimenavigationcoordinateslocationpositionsignalsmokemirrorwhistlelightflashpatterncodetransmissionbroadcastreceiverantennadispatchevacuationfirst aidparamedicsurvivorpanicurgencywarningalertsirendistress