单项选择题
Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations，vessels and aircraft? （）
A.Vessel's type
B.Vessel's course
C.Navigational status
D.All of the above
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相关考题
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单项选择题
When should the emergency position-indicating radiobeacon be activated after abandoning a ship?（）
A.Immediately
B.After one hour
C.Only when another vessel is in sight
D.Only after sunset -
单项选择题
When may the automatic identification system (AIS) be switched off? （）
A.At anytime as long as it is properly logged
B.At the Master's professional judgment
C.Only when the vessel is at anchor or in port
D.Under no circumstance -
单项选择题
When communicating on the radiotelephone using plain English，what procedure word indicates the end of my transmission and that a response is necessary? （）
A.Out
B.Over
C.Roger
D.Wilco
