单项选择题
A.Having the vessel head toward the sea
B.Running before a sea
C.Being turned broadside to the sea
D.Having the vessel filled with water
单项选择题 What generally occurs when the land is cooler than the nearby water? （）
单项选择题 Under the IALA-A Buoyage System，a green spar buoy with a triangular topmark would indicate that the buoy（）.
单项选择题 Under normal weather and sea conditions when securing a stack of containers with twist locks，lashings are required when the tier exceeds what height? （）