The limit switches shut off the winch in order to prevent:

Correct Answer: Option B — The boat from being hoisted by the winch when within the last 12 inches of the track

Limit switches are safety devices installed on davit systems to prevent mechanical damage. By automatically cutting power to the winch motor when the lifeboat reaches the final 12 inches of the track, they prevent the boat from striking the davit head or over-tensioning the falls during the final hoisting phase.