单项选择题
A.not under command
B.restricted in her ability to maneuver
C.engaged in towing
D.fishing
单项选择题 In a crossing situation,the vessel which has the other on her own starboard side shall（）.
单项选择题 In a narrow channel, a signal of intent which must be answered by the other vessel, is sounded by a vessel（）.
单项选择题 In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so（）.