單項(xiàng)選擇題

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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Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.

A.countries
B.states
C.names
D.groups

單項(xiàng)選擇題

At least（）two-way VHF radiotelephone apparatus shall be provided on every cargo ship of 300 tons gross tonnage and upwards but less than 500 tons gross tonnage.

A.one
B.two
C.three
D.four