单项选择题
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
The projecting lugs of the rudderpost which furnish sup...
单项选择题The projecting lugs of the rudderpost which furnish support to the rudder are called（）.
A.bases B.gudgeons C.pintles D.rudder lugs
The owner or Master of a towing vessel shall ensure tha...
单项选择题The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged（）.
A.on each watch，immediately before being relieved B.before embarking on a voyage of more than 24 hours C.daily，at 1200 local zone time D.weekly，before 0000 Sunday
