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Operation of caisson lock Contemporary engraving of the lock at Combe Hay. 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 ...
A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
The Eisenhower Locks in Massena, New York St. Lawrence Seaway St. Lawrence Seaway separated navigation channel near Montreal. The St. Lawrence Seaway (French: la Voie Maritime du Saint-Laurent) is a system of rivers, locks, canals and channels in Eastern Canada and Northern United States that permits oceangoing vessels to travel from the Atlantic Ocean to the Great Lakes of North America, as ...
The metal sheathing of Cutty Sark, made from the copper alloy Muntz metal. Copper sheathing is a method for protecting the hull of a wooden vessel from attack by shipworm, barnacles and other marine growth through the use of copper plates affixed to the surface of the hull, below the waterline.
Small boats with outboard engines and personal water crafts (PWC) tend to ingest water simply because they run in and around it. During a rollover, or when a wave washes over the craft, its engine can hydrolock, though severe damage is rare due to the special air intakes and low rotating inertia of small marine engines.
The Peterborough Lift Lock is a boat lift located on the Trent Canal in the city of Peterborough, Ontario, Canada, and is Lock 21 on the Trent-Severn Waterway. For many years, the lock's dual lifts were the highest hydraulic boat lifts in the world, raising boats 65 ft (20 m). This was a considerable accomplishment in the first years of the ...
Metal fire-resistance rated door with a lockset consisting of a locking latch bolt operated by lever handle with an escutcheon that encompasses the locking mechanism.. A lockset (alternatively lock set) is the hardware and components that make up the locking or latching mechanism that can usually be found on a door or other hinged object but can also include sliding doors and dividers. [1]
The protective metal sheeting or plating protecting against water entry into ventilation shafts in large ships is called a coaming as it fulfills the same water-deflection purpose. The term was borrowed by the aviation industry to refer to a low rim around the opening for an unenclosed cockpit.