单项选择题
While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered during daylight hours in good visibility and clear of any navigational hazards，the lookout may be（）.
A.the helmsman B.the mate on watch C.Either A or B D.Neither A nor B
单项选择题 While loading cargo，a white trimming light on the starboard side comes on. This indicates that（）.
单项选择题 Which vessel is NOT classified as “restricted in her ability to maneuver”? （）
单项选择题 Which variable factor affects the initial lashing requirements aboard Ro-Ro vessels? （）
