单项选择题
A.crew members using their arms B.crew members using the strong muscles of their legs C.fenders D.No fending is necessary due to the rugged construction of most towing vessels
A mooring system that results in a spread system withou...
单项选择题A mooring system that results in a spread system without anchor buoys is called a（）.
A.permanent chasing system B.wire rope mooring system C.shepherd's crook mooring system D.spring buoy mooring system
A mooring line is described as being 6x24，1-3/4 inch wi...
单项选择题A mooring line is described as being 6x24，1-3/4 inch wire rope. What do the above numbersrefer to?（）
A.Strands，yarns，circumference B.Strands，wires，diameter C.Wires，yarns，diameter D.Strands，circumference，wires
A Danforth lightweight anchor does NOT hold well in whi...
单项选择题A Danforth lightweight anchor does NOT hold well in which type of bottom? （）
A.Mud B.Grass C.Sand D.Clay
