单项选择题
Vessel constrained by her draught is（）.
A.a non-power driven vessel B.a sailing vessel C.a power driven vessel D.a power driven vessel or a non-power driven vessel
单项选择题 Underway vessels shall at all time maintain a proper look-out（）.
单项选择题 Under International Rules（）.
单项选择题 The wind is ESE，and a sailing vessel is steering NW. Which fog signal should she sound?（）
