单项选择题
Risk of collision may exist（）.
A.if the compass bearing of an approaching vessel does not appreciably change
B.even when an appreciable bearing change is evident, particularly when approaching a vessel at close range
C.if you observe both sidelights of a vessel ahead for an extended period of time
D.All of the above
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相关考题
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单项选择题
Rule 14 describes the action to be taken by vessel meeting head-on. Which of the following conditions must exist in order for this rule to apply?（）.
A.Both vessels must be power-driven
B.They must be meeting on reciprocal or nearly reciprocal courses
C.The situation must involve risk of collision
D.All of the above -
单项选择题
Sailing vessels are stand-on over power-driven vessels except（）.
A.in a crossing situation
B.in a meeting situation
C.when they are the overtaking vessel
D.on the inland waters of the PR China -
单项选择题
Set of current is（）.
A.velocit in knot
B.irection from which it flows
C.estimated current
D.direction toward which it flows
