单项选择题
A check line is（）.
A.A safety line attached to a man working over the side
B.Used to measure water depth
C.Used to slow the headway of a barge
D.Used to measure the overhead height of a bridge
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A（）is the intersection of the surface of a sphere and a plane passing through the center of the sphere.
A.great circle
B.small circle
C.large circle
D.general circle -
单项选择题
A “Mediterranean moor” should be used when（）.
A.anchoring in the Mediterranean
B.docking stern to a berth
C.docking bow to a berth
D.anchoring in a strong current -
单项选择题
（）is not a step for anchoring preparation.
A.To take off the covers from the hawse pipes and clear the spurling pipes
B.To make sure that the windlass is out of gear and the brakes are on
C.To turn the windlass over slowly
D.To inform the engine room to ensure that deck power and water are off
