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A liftboat is a self-propelled, self-elevating vessel used in support of various offshore mineral exploration and production or offshore construction activities. A liftboat has a relatively large open deck to accommodate equipment and supplies, and the capability of raising its hull clear of the water on its own legs so as to provide a stable ...
A portable boat lift is a tool designed specifically to allow one person to transport, set up, and safely separate boats from boat trailers. Portable boat lifts are intended to be used on land, rather than near, in, or on the water. Sometimes referred to as a boat hoist, this equipment holds the waterfcraft out of the water so that maintenance ...
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A tub boat lift is a type of boat lift designed to lift tub boats between different elevations of a canal. Tub boats are small boats used to transport coal and other minerals, sometimes working singly, sometimes in long trains. A tub boat lift ( German: Kahnhebehaus) lifts the boat out of the water. Most other types of boat lift such as locks ...
Geheyan dam boat lift, also in Hubei Province, capable of lifting vessels of 300 tons displacement. The dam was completed in 1994, but technical difficulties delayed the opening of the ship lift for four more years. Longtan dam boat lift, capacity to lift vessels of 250 tons, in a basin 40×10.8×1.8 meters, and a vertical lift of 68.5 meters.
On the first try, before full flying speed had been reached, the aircraft developed enough lift to raise the front wheels off the track, and another crash resulted. It was time to re-think the catapult system, and to help design it, Sperry and Hewitt hired a young and promising engineer named Carl Norden. The first try with the new system was ...
Shiplift. A shiplift is a modern alternative for a slipway, a floating dry dock or a graving dry dock. A shiplift is used to dry dock and launch ships. It consists of a structural platform that is lifted and lowered exactly vertically, synchronously by a number of hoists. First, the platform is lowered underwater, then the ship is floated above ...
The Fontinettes Boat Lift was capable of lifting vessels of 300 tonnes displacement. [ 2] It was designed to avoid the need to use five locks, which took some 90 minutes, to change height by 13 metres. It was inspired by the similar Anderton Boat Lift built in 1875 in Cheshire, England. The original five locks were kept in place until 1963 for ...