DO NOT，REPEAT，NOT OVER-TAKE means that you should（）.

单项选择题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

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