单项选择题
When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.
A.reduce the time the sounding tube is open B.avoid creating a spark C.lessen the effect of roll or pitch on the reading D.lessen the effect of heave on the reading
单项选择题 When running before a heavy sea，moving weights aft will affect the handling of a vessel by （）.
单项选择题 When preparing a ship for heavy weather，fuel oil day tanks should be（）.
单项选择题 When a vessel is swinging from side to side off course due to quartering seas，the vessel is （）.
