单项选择题
A.require ballast B.be down by the head C.sink D.float
For an upright vessel，draft is the vertical distance be...
单项选择题For an upright vessel，draft is the vertical distance between the keel and the（）.
A.waterline B.freeboard deck C.plimsoll mark D.amidships section
For a floating vessel，true mean draft is always the（）.A...
单项选择题For a floating vessel，true mean draft is always the（）.
A.average of the observed drafts B.draft at the center of flotation C.draft corresponding to the calculated displacement D.mean of the calculated drafts
Deballasting a double bottom has what affect on KG?（）A....
单项选择题Deballasting a double bottom has what affect on KG?（）
A.KG is increased B.KG is decreased C.KG is not affected D.KG increases at light drafts and decreases at deep drafts
