单项选择题

A.one monthB.four monthsC.six monthsD.one yearBy regula……

By regulation，you MUST keep a record of the use of your radiotelephone for at least（）.

A.one month
B.four months
C.six months
D.one year

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单项选择题Automatic identification systems (AIS) are required to（）.

A.provide safety-related information automatically to shore stations，other vessels and aircraft
B.receive safety-related information automatically from similarly equipped vessels
C.exchange safety-related information with shore-based facilities
D.All of the above

单项选择题Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT（）.

A.navigation status
B.ship's heading
C.port of origin
D.time stamp

单项选择题Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT（）.

A.Port of origin
B.Name of vessel
C.Course and speed over ground
D.Draft of vessel

单项选择题AMVER is a system which provides（）.

A.satellite communications
B.navigational information
C.weather information
D.position reporting service

单项选择题A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.

A.will be coming to periscope depth
B.will be coming to the surface
C.is on the bottom in distress
D.is in distress and will try to surface