單項選擇題Risk of collision may be deemed to 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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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題Set of current is（）.

A.velocit in knot
B.irection from which it flows
C.estimated current
D.direction toward which it flows

5.單項選擇題Several shoals（）reported to exist in the area south-west of the Brothers.

A.have
B.have been
C.has
D.has been