单项选择题
A.S B.T C.W D.F
When a ship is in tropical zone and in seawater of dens...
单项选择题When a ship is in tropical zone and in seawater of density 1025,she must not load to more than the upper edge of the line marked（）.
A horizontal the 450mm long and 25 mm wide cuts through...
单项选择题A horizontal the 450mm long and 25 mm wide cuts through the loadline disc.It is called the（）.
A.the deck like B.plimssoll dise C.plimssoll line D.summer load line
Vertically below the deckline is a circle whose outside...
单项选择题Vertically below the deckline is a circle whose outside diameter is 300mm.It is called the（）.
A.the deck line B.Plimsoll disc C.Plimsoll line D.summer load line
