I assume it would be a hydraulic system using hand-power. If it's got electrical/mechanical power and is intended to be an infrequently used emergency system,

I assume it would be a hydraulic system using hand-power. If it's got electrical/mechanical power and is intended to be an infrequently used emergency system, then you probably have to count on it being poorly maintained and still have a fully manual fallback. From what I understand, these sort of systems on old 20th century warships ar least are all hand-crank powered.