單項(xiàng)選擇題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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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

4.單項(xiàng)選擇題A fog signal consisting of one prolonged blast followed by four short blasts would indicate thepresence of a（）.

A.vessel being towed
B.fishing vessel engaged in trawling
C.vessel at anchor warning of her location
D.power-driven pilot vessel on station underway

5.單項(xiàng)選擇題A flashing light is a light that（）.

A.flashes at regular intervals at a frequency of 120 flashes or more per minute
B.is yellow in color
C.is visible over an arc of the horizon of not less than 180°nor more than 225°
D.All of the above