中国航海知识论坛http://www.Iamseaman.com.cnGMDSS1.2.1GlobalMaritimeDistressAndSaferySystemGMDSS2GMDSS74SOLAS883250ms2200Hz1300HzMF2182KHz4DistresssignalMAYDAYmaiderMAYDAYMAYDAYSOS5UrgencysingalPANPANpannePAN-PAN6SafetysingalSECURITE7MaritimeMobileService8Distresstraffichttp://www.Iamseaman.com.cn中国航海知识论坛9Urgencytraffic10Safetytraffic11Theworld-widenavigationalwarningserviceWWNWS)(IMO)(I...