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2. Multihull - Wikipedia

   en.wikipedia.org/wiki/Multihull

   A catamaran is a vessel with twin hulls. Commercial catamarans began in 17th century England. Separate attempts at steam-powered catamarans were carried out by the middle of the 20th century. However, success required better materials and more developed hydrodynamic technologies. During the second half of the 20th century catamaran designs ...

3. Catamaran - Wikipedia

   en.wikipedia.org/wiki/Catamaran

   The Spirit of Dallas catamaran on White Rock Lake A Formula 16 beachable catamaran Powered catamaran passenger ferry at Salem, Massachusetts, United States. A catamaran (/ ˌ k æ t ə m ə ˈ r æ n /) (informally, a "cat") is a watercraft with two parallel hulls of equal size. The wide distance between a catamaran's hulls imparts stability ...

4. Hull (watercraft) - Wikipedia

   en.wikipedia.org/wiki/Hull_(watercraft)

   A hull is the watertight body of a ship, boat, submarine, or flying boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast. The line where the hull meets the water surface is called the waterline.

5. Small-waterplane-area twin hull - Wikipedia

   en.wikipedia.org/.../Small-waterplane-area_twin_hull

   A small waterplane area twin hull, better known by the acronym SWATH, is a catamaran design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, minimizes a vessel's response to sea state, even in high seas and at high speeds. The bulk of the ...

6. Chine (boating) - Wikipedia

   en.wikipedia.org/wiki/Chine_(boating)

   A padded V-hull is a hull shape found on both pure race boats and standard recreational craft. A variation of the more common V-hull , which has a V-section throughout the length of the vessel, a padded V-hull has a V-section at the bows and the forward part of the keel which then segues into a flat area typically 0.15 metres (5.9 in) to 0.25 ...

7. Tunnel hull - Wikipedia

   en.wikipedia.org/wiki/Tunnel_hull

   Theoretical research and full-scale testing of tunnel hulls has demonstrated the dramatic contributions of 'close-proximity ground effect' on enhanced aerodynamic lift/drag in operation of performance tunnel hull designs. [1] Tunnel hulls are distinguishable from other catamarans by the typical close hull spacing and solid deck in between the ...

8. Ship measurements - Wikipedia

   en.wikipedia.org/wiki/Ship_measurements

   The BOC for vessels is measured as follows: For a catamaran: the perpendicular distance from the centerline of one hull to the centerline of the other hull, measured at deck level. For a trimaran: the perpendicular distance between the centerline of the main hull and the centerline of either ama, measured at deck level. This term in typically ...

9. V-hull (boat) - Wikipedia

   en.wikipedia.org/wiki/V-hull_(boat)

   A V-hull, is the shape of a boat or ship in which the contours of the hull come in a straight line to the keel. [1] V-hull designs are usually used in smaller boats and are useful in providing space for ballast inside the boat.