單項選擇題When a vessel sees the other ahead or nearly ahead,by night she could see the masthead lights of the other in a line or nearly in a line or both side lights,()shall be deemed to exist.

A.head-on situation
B.end-situation
C.crossing situation
D.close-quaters situation


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1.單項選擇題When in sight of another vessel,any action taken to avoid collision must().

A.be accompanied by sound signals
B.not result in another close quarters situation
C.include a speed change
D.All of the above