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S-bottom hulls are sailing boat hulls with a midships transverse half-section shaped like an s. [clarification needed] In the s-bottom, the hull has round bilges and merges smoothly with the keel, and there are no sharp corners on the hull sides between the keel centreline and the sheer line. Boats with this hull form may have a long fixed deep ...
Frames support the hull and give the ship its shape and strength. In wooden shipbuilding, each frame is composed of several sections, so that the grain of the wood can follow the curve of the frame. Starting from the keel, these are the floor (which crosses the keel and joins the frame to the keel), the first futtock , the second futtock , the ...
Such a hull has a maximum "hull speed" which is a function of its waterline length. An exception is the catamaran, whose twin hulls are usually so fine that they do not engender a bow wave. Planing hulls: planing hulls have a shape that allows the boat to rise out of the water as the speed increases. Sail boats that plane are typical V-shaped ...
The gunwale of an undecked boat. The gunwale (/ ˈ ɡ ʌ n əl /) is the top edge of the hull of a ship or boat. [1]Originally the structure was the "gun wale" on a sailing warship, a horizontal reinforcing band added at and above the level of a gun deck to offset the stresses created by firing artillery.
An unusual type of double-outrigger boat design, preserved in scale models in the Pitt Rivers Museum, forms a triangle shape. The front ends of the outriggers are attached directly to the hull, while the rear ends are splayed out. These boats were small and used exclusively as passenger ferries in the Pasig River of the Philippines. [24]
Keel: the bottom structure of a ship's hull. [16] Leeward: side or direction away from the wind (opposite of "windward"). [17] On deck: to an outside or muster deck (as "all hands on deck"). [18] On board: on, onto, or within the ship [19] Onboard: somewhere on or in the ship. [20] Outboard: attached outside the ship. [21]