单项选择题
In determining if risk of collision exists，if there is any doubt，such risk shall be deemed to（）.
A.exist
B.exists
C.existing
D.to be existed
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相关考题
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单项选择题
In determining safe speed，all of the following must be taken into account EXCEPT the（）.
A.maximum horsepower of your vessel
B.presence of background lights at night
C.draft of your vessel
D.maneuverability of your vessel -
单项选择题
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 -
单项选择题
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
