单项选择题
A.under sail
B.towing
C.restricted in her ability to maneuver
D.engaged in pilotage duty
单项选择题 In a combination chain and wire rope mooring system，the anchor chain is deployed at the anchor end of the line to（）.
单项选择题 Galvanizing would not be suitable for protecting wire rope which is used for（）.
单项选择题 During a storm，the chance of fatigue failure of a mooring line will increase as（）.