單項(xiàng)選擇題A power-driven vessel，when towing astern，shall show（）.

A.two towing lights in a vertical line
B.a towing light in a vertical line above the sternlight
C.two towing lights in addition to the sternlight
D.a small white light in lieu of the sternlight


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1.單項(xiàng)選擇題A power-driven vessel underway shall keep out of the way of（）.

A.a vessel restricted in her ability to maneuver
B.a vessel under command
C.a passenger ship
D.a seaplane on the water

2.單項(xiàng)選擇題A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.

A.three masthead lights in a vertical line instead of either the forward or after masthead light
B.two masthead lights in a vertical line instead of either the forward or after masthead lights
C.two towing lights in a vertical line at the stern
D.a small white light aft of the funnel

3.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

4.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

5.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