单项选择题
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
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
A.berthing B.searching C.anchoring D.picking up pilot