According to the basic concept of GMDSS,（）can be rapidly alerted to a distress incident.<br>A:only SAR authorities on land<br>B:all ships in a very large sea area<br>C:the nearest coast stations and port radios<br>D:the SAR authorities ashore as well as ships in the vicinity of the casualty

According to the basic concept of GMDSS,（）can be rapidly alerted to a distress incident.
A:only SAR authorities on land
B:all ships in a very large sea area
C:the nearest coast stations and port radios
D:the SAR authorities ashore as well as ships in the vicinity of the casualty

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