When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.

A.get the bow up
B.discharge from the wings first
C.discharge from the centerline tanks first
D.discharge from amidships first

A.Cranes are able to pick up and drop loads over a greater spotting area
B.Increased safety because the deck is clear of running and standing rigging
C.Simplicity of operation of the crane by its operator
D.All of the above

A.It allows for rotation of the hook in the single mode
B.It is required to“twin-up”30-ton pedestal cranes
C.It is used to pick up light loads
D.It is used to rigidly connect two cranes