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2. Float (nautical) - Wikipedia

   en.wikipedia.org/wiki/Float_(nautical)

   A pontoon boat is a flattish boat that relies on nautical floats for buoyancy. Common boat designs are a catamaran with two pontoons, or a trimaran with three. [2] In many parts of the world, pontoon boats are used as small vehicle ferries to cross rivers and lakes. [3] An anchored raft-like platform used for diving, often referred to as a pontoon

3. Hydrocopter - Wikipedia

   en.wikipedia.org/wiki/Hydrocopter

   A rescue hydrocopter in Kuopio, Finland. A hydrocopter is an amphibious propeller-driven catamaran with a boat-like hull, small wheels and pontoon skis (as in a seaplane).An aircraft engine with a propeller and air rudder powers the vehicle over water, ice, snow and land.

4. Airlift (dredging device) - Wikipedia

   en.wikipedia.org/wiki/Airlift_(dredging_device)

   Compressed air is injected into the pipe in one to three second bursts with an interval long enough to let the resulting bubble to rise to the higher, output end of the pipe. The bubble moves water through the pipe sucking debris from the lower end and depositing it from the upper end of the pipe.

5. Semi-submersible platform - Wikipedia

   en.wikipedia.org/wiki/Semi-submersible_platform

   These semi-submersible crane vessels (SSCV) consist of two lower hulls (pontoons), three columns on each pontoon and an upper hull. Shortly after J. Ray McDermott and Saipem also introduced SSCVs, resulting in two new enormous vessels DB-102 (now Thialf) and Saipem 7000, capable of lifting respectively 14,200 and 14,000 tons.

6. Auxiliary floating drydock - Wikipedia

   en.wikipedia.org/wiki/Auxiliary_floating_drydock

   Sections could be put together to lift larger ships. AFDB were needed to repair battleships, aircraft carriers, cruisers, and large auxiliary ships. The AFDB-1 Artisan had 10 sections (A to J) for a total lift of 100,000 tons, and was 1,000 ft (300 m) long with all 10 sections installed. AFDB-1 to 7 were built between 1943 and 1945 and towed to ...

7. List of boat lifts - Wikipedia

   en.wikipedia.org/wiki/List_of_boat_lifts

   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. [2] Yantan Ship Lift; Three Gorges Dam, boat lift (possibly complete July 2016) [3] and staircase ...