A.assist in drydock alignment
B.improve the vessel's stability
C.protect the vessel from slamming against piers
D.reduce the rolling of the vessel

A.deeply-grooved drum on the windlass with sprockets which engage the links of the anchor chain
B.winch that is running out of control due to a failure of the overspeed trips
C.line that has jumped off the gypsyhead while under strain
D.nylon line that parts under strain and whips back in a hazardous manner