With the help of GMDSS（）can be alerted to a distress incident as soon as possible.<br>A:all ships in a large sea area<br>B:only the sea authorities ashore<br>C:the SAR units ashore and at sea<br>D:the port radios and the coast stations

With the help of GMDSS（）can be alerted to a distress incident as soon as possible.
A:all ships in a large sea area
B:only the sea authorities ashore
C:the SAR units ashore and at sea
D:the port radios and the coast stations

出自：海船船员证

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