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全球海上遇险与安全系统 GMDSS 是指能使陆地搜救机关和遇险船邻近船舶,既迅速得到遇险事件报警,又以最短时间协调搜救行动,平时还能提供紧急和安全通信、接收航海安全信息的系统。一、GMDSS 根据不同的无线电分系统及其地理覆盖和提供的业务范围,按活动海区范围对船舶装备要求作如下划分:A1区——甚高频(VHF)岸台,覆盖范围为20～30海里;A2区——中频(MF)岸台,覆盖范围为100海里(含A1区);A3区——静止海事通信卫星,覆盖区约在南北纬70°之间(含 A1和 A2区);A4区——除 A1、A2和 A3区以外的剩
The global maritime distress and safety system GMDSS refers to the ability to make land search and rescue agencies and ships in distress near the ship, both to quickly get distress event alarm, and coordination of search and rescue operations in the shortest possible time, usually also provide emergency and safety communications, receive sailing safety information system . 1. According to the different radio subsystems and their geographic coverage and business scope, GMDSS classifies the requirements of ship equipment according to the scope of the active sea area as follows: Zone A1 - VHF shore station with a coverage of 20-30 Sea area; Zone A2 - intermediate frequency (MF) coast station covering 100 nautical miles (including area A1); area A3 - Stationary maritime communications satellite covering about 70 ° north and south latitude (including areas A1 and A2) ; Zone A4 - Except for areas beyond A1, A2 and A3