maritime distress system

基本解释

The country's Global Maritime Distress and Safety System has been put into operation.
中国全球海上遇险和安全系统投入运行。
SOS remained the maritime radio distress signal until 1999, when it was replaced by the Global Maritime Distress Safety System.
SOS到1999年仍是呼救型号，直到后来被全球呼救安全系统所取代。
blog.sina.com.cn

Through collaboration with the International Maritime Organization (IMO) and International Hydrographic Organization (IHO), the worldwide system of navigational and meteorological areas associated with the Global Maritime Distress Safety System (GMDSS) has recently been expanded by JCOMM to include five new areas in the Arctic.
UNESCO: Oceanographers and meteorologists discuss climate change, maritime and coastal safety United Nations Educational, Scientific and Cultural Organization
The last significant amendment was made in 1988 to replace Morse code with the Global Maritime Distress Safety System (GMDSS).
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