A load line is assigned to a ship to insure adequate stability and（）.

A.mooring tension
B.riser tension
C.lifesaving equipment
D.structural strength

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单项选择题

（）refers to the depth of a vessel below the waterline，measured vertically to the lowest part of the hull，propellers or other reference points.

A.Free board
B.Stability height
C.Metacentric height
D.Draft

单项选择题

Your vessel was damaged and initially assumed a significant list and trim; however，further increase has been slow. Based on this data，what should you expect?（）

A.The slowing is only temporary and the vessel will probably suddenly capsize or plunge from loss of stability due to change in the waterplane area
B.The vessel can probably be saved if further flooding can be stopped
C.The vessel will continue to slowly list and/or trim due to the free surface effect and free communication effect
D.The vessel will suddenly flop to the same or greater angle of list on the other side and may capsize

单项选择题

Your vessel is damaged with no list，but down by the stern. There is progressive flooding and trim by the stern is increasing. What is the effect on transverse stability after the deck edge at the stern is submerged?（）

A.KB increases，increasing BM and therefore GM
B.KG increases due to the weight of the added water on deck
C.BM decreases from loss of water plane and greater volume
D.There is no effect on transverse stability

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