单项选择题
A.shrouds B.halyards C.sheets D.forestay
Reducing free surfaces has the effect of lowering the（）...
单项选择题Reducing free surfaces has the effect of lowering the（）.
A.uncorrected KG B.virtual height of the center of gravity C.metacenter D.metacentric height
On which vessels are the officers and deck crew allowed...
单项选择题On which vessels are the officers and deck crew allowed to operate under a two-watch system on voyages of less than 600 miles? （）
A.Towing vessels B.Offshore supply vessels C.Barges，when manned D.All of the above
Maritime Administration personnel may be allowed in the...
单项选择题Maritime Administration personnel may be allowed in the pilothouse upon the responsibility of the（）.
A.Chief Officer B.Navigator C.most senior person present from the Maritime Administration D.officer in charge of the watch
