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

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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
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
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