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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 .
USS Artisan with USS Antelope (IX-109) and LST-120 in the dock at Espiritu Santo, New Hebrides Islands, 8 January 1945 Los Alamos (AFDB-7), with a repaired submarine at Holy Loch, Scotland in 1985 YFD-2 The first Yard Floating Dock built in 1901, arriving Pearl Harbor 23 October 1940 from New Orleans Naval Yard USS Pennsylvania in drydock USS Dewey, the second YFD, c. 1906–1907
Initially a linkspan was a ramp that was attached to the pier at one end and was suspended above the water at the other. The height above the water was controlled either by hydraulic rams or cables, these types of linkspans were less well designed for the various conditions of the tide, wave and current and so were superseded by underwater tank linkspans that through compressed air can be ...
The (enclosed) lifeboat is on a ramp and slides down and off of the ship when engaged. This is done by pumping a lever that is inside the lifeboat by the pilot. [ 9 ] If there is not enough hydraulic pressure to release the stop fall, a pump on the inside must be rotated to build up the hydraulic pressure to release the lifeboats stopfall hook.
55-ft Aids to Navigation Boat (ANB) Equipped with a crane that is used for hoisting and securing the various buoys and aids to navigation that the Coast Guard supplies for waterways. The boat is 55 ft long to the transom, and 58 ft 9 in to the end of the swim platform. It is 25 ft tall unfixed and has a navigational draft of 8 ft.
Some modern patrol vessels are equipped with a stern launching ramp, or simply launching ramp, for deploying smaller rescue or pursuit boats without requiring the parent ship to first come to a halt. [ 1 ] [ 2 ] [ 3 ] Typically the smaller craft are powered by water-jets, and can drive themselves up the ramp by their own power.