单项选择题
To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.
A.weight of cable to weight of vessel B.weight of cable to weight of anchor C.length of anchor to depth of water D.length of cable to depth of water
单项选择题 Three SHORT BLASTS mean（）.
单项选择题 The winch is liable（）worn-out in this way.
单项选择题 The winch at Hatch No.3 is（）trouble.
