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

相关考题

Automatic identification systems (AIS) are required to（...

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

Automatic identification systems (AIS) are expected to ...

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

Automatic identification systems (AIS) are expected to ...

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

海上通信基本知识

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