A.Four times the depth of waterB.Two and one-half times……

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

单项选择题We took usual steps:sounding the depth，reversing and stopping engine，paying out anchor and 60 fathoms of chain cable in the depth of 12 fathoms．The operation above is（）.

A.berthing
B.searching
C.anchoring
D.picking up pilot