maritime distress system

基本解释

The country's Global Maritime Distress and Safety System has been put into operation.
中國全球海上遇險和安全系統投入運行。
SOS remained the maritime radio distress signal until 1999, when it was replaced by the Global Maritime Distress Safety System.
SOS到1999年仍是呼救型號，直到後來被全球呼救安全系統所取代。
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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