单项选择题
A.if the circumstances of the case admit, avoid crossing ahead of the other
B.change course to port to keep out of the way
C.overtaking another
D.All of the above
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（）.
单项选择题 In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so（）.