Boat lift

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  Canal inclined plane

  An inclined plane is a system used on some canals for raising boats between different water levels. An inclined plane is quicker, and wastes less water, than a flight of canal locks, but is more costly to install and run. It can be considered a specialised type of funicular railway. A development...
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  Pound lock

  A pound lock is type of lock that is used almost exclusively nowadays on canals and rivers. A pound lock has a chamber (the pound) with gates at both ends that control the level of water in the pound. In contrast, an earlier design with a single gate was known as a flash lock. Indirect evidence...
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  Flash lock

  Early locks were designed with a single gate, known as a flash lock. The earliest European references to what were clearly flash locks were in Roman times. In England the "gate" was a set of boards, called paddles, supported against the current by upright timbers called rymers. Boats moving...
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  Caisson lock

  A caisson lock is a type of canal lock in which a narrowboat is enclosed in a sealed box and raised or lowered between two water levels. It was first demonstrated at Oakengates on the now lost Shropshire Canal in 1792, where its inventor, Robert Weldon (b:?1754 to d:1810) built a half-scale model....