单项选择题
A power-driven vessel shall have her engine ready for（）when the visibility is restricted.
A.immediately stop
B.immediately maneuvering
C.immediately anchoring
D.immediately going astern
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相关考题
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单项选择题
A power-driven vessel not under command at night must show her sidelights when（）.
A.making headway
B.making no headway
C.moored to a buoy
D.at anchor -
单项选择题
A power-driven fishing vessel is underway on the high seas and is not engaged in fishing. Which of the following factors determines what lights she will show?（）.
A.Whether she is normally a fishing or a trawling vessel
B.Her gross tonnage
C.Her length
D.The type of gear she carries -
单项选择题
A power driven vessel when towing and the length of the tow exceeds 200 meters shall exhibit during daylight hours where they can best be seen which of the following shapes? （）
A.a diamond shape
B.two cones，apexes together
C.a black ball
D.one cone，apex upward
