What is NOT suitable for use in making up the towing rig for a heavy，long ocean tow?（）

A.Fiber core rope offers greater strength
B.Fiber core rope offers greater flexibility
C.Fiber core rope can be used at higher operating temperatures
D.Fiber core rope is the only type authorized for cargo runners

A.Etch the wire with acid
B.Install a wire seizing on the wire that will be inside the socket
C.Ensure the fiber core is well lubricated
D.Pour molten babbitt metal into the socket

A.A drainage pipe that carries rain or spray from an upper deck to a lower deck
B.A pipe under the anchor windlass leading to the chain locker
C.A chute，usually over the stern，to lead dumped garbage clear of the hull
D.An opening in the deck leading outside the hull