单项选择题

When anchoring a vessel under normal conditions，which scope of chain is recommended? （）

A.Four times the depth of water
B.Two and one-half times the depth of water
C.Five to seven times the depth of water
D.Fifteen times the depth of water

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单项选择题

When anchored，increasing the scope of the anchor chain normally serves to（）.

A.prevent fouling of the anchor
B.decrease swing of the vessel
C.prevent dragging of the anchor
D.reduce strain on the windlass

单项选择题

What type of stopper would you use on a nylon mooring line? （）

A.Chain
B.Nylon
C.Manila
D.Wire

单项选择题

What is the purpose of the intermediate spring?（）

A.Serves as a backup for the main tow hawser in case of failure
B.Provides weight and flexibility to the total tow makeup
C.Lengthens the main tow hawser to keep the tow in step
D.Distributes the towing load