A tabernakle that is taller 3 -4 ft with the pin as high as reasonable , can have the lower portion filled with lead.
Then there is little/no weight involved in raising or lowering.
The Brits on their commercial river boats went further with a Luchet.(sp?)
Here the pivot pin would be as with a tabernakle , but the mast would be stepped on the keel, and the foot could rise thru the fwd deck thru a long hatch.
They could lower the mast underway , slip under a bridge , and re-hoist with out loosing way.
Nifty , but probably a hard interior to own in a motor cruiser.
FF
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