Marine railway Lock (water navigation)

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big chute marine railway in trent-severn waterway, ontario, canada


a marine railway similar canal inclined plane in moves boats or down slope on rails. however, vessel carried dry (in carrying frame, or cradle) rather in water-filled caisson. principle based on patent slip, used hauling vessels out of water maintenance.


in operation, boat navigated carrying frame, has been lowered water. boat secured cradle, possibly raising slings under hull using hydraulics, , cradle hauled out of water , hill cable. @ top of slope, cradle lowered upper waterway, , boat released. boat not floating, archimedes principle not apply, weight lifted or lowered device varies – making counterbalancing (by dead weights or second boat carriage) more difficult.


in locations, notably big chute marine railway on trent-severn waterway, in ontario, canada, marine railway installed temporary measure @ planned site of flight of conventional locks. in , several other cases, locks never built, , marine railway continued serve on permanent basis.







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