单项选择题
A vessel is considered to be “restricted in her ability to maneuver” under the Rules if she is （）.
A.at anchor B.mineclearing C.engaged in fishing D.engaged in towing
单项选择题 A vessel is carrying three lights in a vertical line. The highest and lowest of these are red and the middle light is white. Which statement is always TRUE? （）
单项选择题 A vessel is “listed” when it is（）.
单项选择题 A vessel is “in sight” of another vessel when（）.
