Item "F" shown in the illustration represents two hydraulic pumps that are __________. GS-0103

Correct Answer: Option D — manually operated with one located in the engine room and the other in the shaft alley of the water tight door

Watertight door hydraulic systems require redundancy for safety. Manual pumps located on both sides of the bulkhead ensure that the door can be operated from either the engine room or the shaft alley, even in the event of a total electrical power failure or localized flooding.