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The term "boat lift" originally referred to lift locks. In modern usage the term "boat lift," as opposed to "portable boat lift," usually refers to devices permanently installed at a dock to simply lift a boat above the water, a type of ship lift. It is not specifically designed for separating a boat from a trailer.
A tub boat lift (German: Kahnhebehaus) lifts the boat out of the water. Most other types of boat lift such as locks or inclined planes are designed to move the boat afloat in some kind of water-filled tank, and, apart from maximum dimensions, are not restricted in the type of craft transported. Tub boat lifts and tub boats are designed to work ...
A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock. It may be vertically moving, like the Anderton boat lift in England , rotational, like the Falkirk Wheel in Scotland , or operate on an inclined plane , like the Ronquières inclined plane ...
Ship caisson at Droogdok Jan Blanken at Hellevoetsluis. 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.
A small motor-boat lifted from the water by a boat lift at La Rochelle, France, 2016. Smaller devices called "Boat lifts" are available that simply raise yachts, sailboats, or small watercraft above the water level at a dock for storage, for reduced maintenance cost and increased security. They can be operated by cables, by hydraulics, or by ...
The Scharnebeck twin ship lift is a 38-metre (125 ft) boat lift in Scharnebeck, northeast of Lüneburg, in the District of Lüneburg, Lower Saxony, Germany.It is on the Elbe Lateral Canal, which connects the Elbe (northern and lower endpoint, at Artlenburg) and the Mittellandkanal (southern and upper endpoint, near Wolfsburg), and is one of two constructions on the canal that overcomes the ...
A slipway, also known as boat ramp or launch or boat deployer, is a ramp on the shore by which ships or boats can be moved to and from the water. They are used for building and repairing ships and boats, and for launching and retrieving small boats on trailers towed by automobiles and flying boats on their undercarriage .
The system depended on the submerged, sealed box (the "caisson", from the French for "large chest" [7]) being heavily ballasted to achieve neutral buoyancy, so it was never possible in ordinary operation to lift it to water level to allow a descending boat to float in.