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Caisson lock. The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower ...
A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock. Graving docks at Birkenhead, closed by a variety of ship caissons and floating (sliding) caissons.
Louis Joubert Lock. Coordinates: 47°16′38″N 2°11′50″W. A ship in the Louis Joubert Lock. The Louis Joubert Lock ( French: Forme Ecluse Louis Joubert ), also known as the Normandie Dock – after the large ocean liner that provided the impetus for the facility to be built, is a lock and major dry dock located in the port of Saint ...
Dock - Wikipedia ... DOCK
St Nazaire Raid
Sheerness Dockyard. View from Garrison Point Fort across the Gun Wharf and Boat Pond, Sheerness Dockyard, 1941. The Navy Board (until 1832); the Admiralty (after 1832). Sheerness Dockyard was a Royal Navy Dockyard located on the Sheerness peninsula, at the mouth of the River Medway in Kent. It was opened in the 1660s and closed in 1960.
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