When anchoring，good practice requires 5 to 7 fathoms of chain for each fathom of depth. In deep water you should use（）.

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

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

单项选择题What could cause a significant difference between actual chain tension and the tension measured by the tensiometer? （）

A.The type of anchor and mooring line being used
B.The type of bottom in which the ship is anchored
C.A significant difference between air and water temperature
D.The chain contacting a chock or fairlead between the tensiometer and the lower swivel fairlead