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  2. 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.

  3. Catamaran - Wikipedia

    en.wikipedia.org/wiki/Catamaran

    When boat speed increases and waves are generated the resistance is dependent on several design factors, particularly hull displacement to length and hull separation to length ratio, it is a non trivial resistance curve with many small peaks as wave trains at various speeds combine and cancel [32] [33] For powered catamarans, this implies ...

  4. Keel - Wikipedia

    en.wikipedia.org/wiki/Keel

    The word "keel" comes from Old English cēol, Old Norse kjóll, = "ship" or "keel".It has the distinction of being regarded by some scholars as the first word in the English language recorded in writing, having been recorded by Gildas in his 6th century Latin work De Excidio et Conquestu Britanniae, under the spelling cyulae (he was referring to the three ships that the Saxons first arrived in).

  5. Sailing ship - Wikipedia

    en.wikipedia.org/wiki/Sailing_ship

    Diagram contrasting course made good to windward by tacking a schooner versus a square-rigged ship. Sailing vessels cannot sail directly into the wind. Instead, square-riggers must sail a course that is between 60° and 70° away from the wind direction [ 76 ] and fore-and aft vessels can typically sail no closer than 45°. [ 77 ]

  6. Sailboat - Wikipedia

    en.wikipedia.org/wiki/Sailboat

    In traditional construction, it is the structure upon which all else depends. Modern monocoque designs include a virtual keel. Even multihulls have keels. On a sailboat, the word "keel" is also used to refer to the area that is added to the hull to improve its lateral plane. The lateral plane is what prevents leeway and allows sailing towards ...

  7. Beam (nautical) - Wikipedia

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

    Graphical representation of the dimensions used to describe a ship. Dimension "b" is the beam at waterline.. The beam of a ship is its width at its widest point. The maximum beam (B MAX) is the distance between planes passing through the outer sides of the ship, beam of the hull (B H) only includes permanently fixed parts of the hull, and beam at waterline (B WL) is the maximum width where the ...

  8. Sail plan - Wikipedia

    en.wikipedia.org/wiki/Sail_plan

    In that period, sail plans might start from smallest to largest boat or ship in a hierarchy of sailing rigs: [10] [2] Yachts. Catboat with a single sail; Sloop with mainsail and jib; Yawl with a small mast behind the steering post; Ketch with a mizzenmast ahead of the steering post; Working boats and coastal freighters. Cutter with a single ...

  9. 420 (dinghy) - Wikipedia

    en.wikipedia.org/wiki/420_(dinghy)

    The hull is fiberglass with internal buoyancy tanks. The 420 has a bermuda rig, spinnaker and trapeze. It has a large sail-area-to-weight ratio, and is designed to plane easily. The 420 is an International class recognised by World Sailing. The name refers to the boat's length of 420 centimetres (4.2 m; 13 ft 9 in).

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