单项选择题 A vessel shall be deemed to be overtaking when she can see at night（）.

单项选择题 A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.

单项选择题 A vessel proceeding along the course of a narrow channel shall keep as near to the outer limitof the channel which lies on her starboard side as it is safe and practicable.Which one of the followings does the statement express?（）.