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
单项选择题 Deballasting a double bottom has what affect on KG?（）
单项选择题 Although KG for a ship in lightweight is relatively high，the vessel is stiff because（）.
单项选择题 Allowance for fresh water for all freeboards other than timber 25mm. This wording is likely to appear in（）.
