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單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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