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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.
In boating, a fender is an air-filled ball or a device in other shape and material used to absorb the kinetic energy of a boat or vessel berthing against a jetty, quay wall or other vessel. [1] Fenders, used on all types of vessels, from cargo ships to cruise ships, ferries and personal yachts, prevent damage to vessels and berthing structures ...
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-Nazaire in Loire-Atlantique, northwestern France . Owned by the Port authority of Nantes-Saint-Nazaire ...
Boat building - Wikipedia ... Boat building
Mark V Special Operations Craft
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