單項選擇題The effectiveness of the action shall be carefully checked until the other vessel is finally ().

A.past
B.clear
C.past or clear
D.past and clear


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1.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

2.單項選擇題Risk of collision is considered to exist if().

A.four vessels are nearby
B.a vessel has a steady bearing at a constant range
C.there is any doubt that a risk of collision exists
D.a special circumstance situation is apparent

3.單項選擇題Power-driven vessels must keep out of the way of sailing vessels except().

A.in a crossing situation
B.when they are making more speed than the power-driven vessel
C.when the sailing vessel is overtaking
D.on the Inland Waters of the United States

4.單項選擇題On open waters,a vessel fishing is in a crossing situation with a vessel sailing located on the fishing vessel’s starboard side. Which vessel is the stand-on vessel?().

A.The fishing vessel because it is to port of the sailing vessel
B.The fishing vessel because it is fishing
C.The sailing vessel because it is to starboard of the fishing vessel
D.The sailing vessel because it is sailing

5.單項選擇題On open waters,a power-driven vessel shall keep out of the way of a().

A.vessel on her port side that is crossing her course
B.vessel that is overtaking her
C.seaplane on the water
D.sailing vessel