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

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单项选择题

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

单项选择题

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

单项选择题

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