[单选题]船舶平均吃水等于首吃水与尾吃水之和的0.5倍成立的条件是（）。

正确答案 ：D

D．漂心在船中

[单选题]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?（）

正确答案 ：C

BM decreases from loss of water plane and greater volume

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