单选题An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.Afree surface effects are reduced due to pocketingBKG is reduced as the vessel seeks the angle of lollCeffective beam is increased causing BM to increaseDunderwater volume of the hull is increased
单选题
An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.
A
free surface effects are reduced due to pocketing
B
KG is reduced as the vessel seeks the angle of loll
C
effective beam is increased causing BM to increase
D
underwater volume of the hull is increased
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