单项选择题
A vessel being pushed ahead is required to carry which of the following lights?（）.
A.Sidelights and a stern light B.Sidelights only C.Sidelights and a small white light at each end D.A small white light at each end
单项选择题 A vessel approaching your vessel from 235°relative is in what type of situation?（）.
单项选择题 A vessel approaching a narrow channel shall（）.
单项选择题 A vessel aground at night is required to show two red lights in a vertical line as well as （）.
