单项选择题
A.immediately stop B.immediately maneuvering C.immediately anchoring D.immediately going astern
A power-driven vessel not under command at night must s...
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
A power-driven fishing vessel is underway on the high s...
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
A power driven vessel when towing and the length of the...
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
