单项选择题
A vessel being towed astern shall show at night（）.
A.the lights required for a power-driven vessel underway B.only the required masthead lights C.a sternlight only D.sidelights and a sternlight
单项选择题 A vessel being pushed ahead is required to carry which of the following lights?（）.
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（）.
