Stick with wire pulley systems.. easily jury repaired.. hydraulics fails out in the ocean or a remote location and your stuffed.. unless your carrying a complete redundant backup..
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It was a dark and stormy night and the captain of the ship said.. "Hey Jim, spin us a yarn." and the yarn began like this.. "It was a dark and stormy night.."
Incorrect. You could fill a hydraulic steering with sea water if you had to and it would get you home. Cookingoil would be preferable.
Assuming the ram has not jammed solid.. a hose has not burst..
Sour grapes from my past..
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It was a dark and stormy night and the captain of the ship said.. "Hey Jim, spin us a yarn." and the yarn began like this.. "It was a dark and stormy night.."