单项选择题

With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.

A.Rate of turn
B.Latitude and longitude
C.Navigational status
D.All of the above

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单项选择题

With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.

A.Call sign and IMO number
B.Course over ground and MMSI
C.MMSI number and call sign
D.Route Plan and navigational status

单项选择题

While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.

A.A decreasing reading on loran pair 9960-X
B.The bearing of Wolf Trap Light changing to the right
C.Increasing soundings
D.The bearing of Wolf Trap Light changing to the left