单项选择题
A.anchor windlass B.jumbo boom C.rudder D.steering engine
The sprocket wheel in a windlass，used for heaving in th...
单项选择题The sprocket wheel in a windlass，used for heaving in the anchor，is called a（）.
A.capstan B.dog wheel C.fairlead D.wildcat
The sprocket teeth on a wildcat are known as the（）.A.pa...
单项选择题The sprocket teeth on a wildcat are known as the（）.
A.pawls B.devil's claws C.whelps D.pockets
The ratio of the height of a vessel’s rudder to its wid...
单项选择题The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
A.aspect ratio B.constriction ratio C.rudder ratio D.steering ratio
