These are four of the chain pumps, on the gun deck, of the USS Constitution. The black, metal framework is part of the pumping mechanism. It appears that the handles of the pump could be folded over when the pump was not in use. This pump was used to raise water from a cistern on the orlop deck.Galleries:Ships, USS Constitution MuseumKeywords:america's ship of state, boston, chain pump, gun deck, massachusetts, pump, sailing ship, uss constitution, uss constitution museumPhoto Location: USS Constitution Museum, Boston, MassachusettsPhotographer: Dr. Roy WinkelmanDate of Photo: 05/28/2011Device Make: CanonDevice Model: Canon EOS 5D Mark IIOriginal Dimensions: 5616×3744Picture Orientation: LandscapeGPS Coordinates: 42°22'20.73"N 71°03'23.54"WPicture Number: 15258
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