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  2. Voith Schneider Propeller - Wikipedia

    en.wikipedia.org/wiki/Voith_Schneider_Propeller

    The Voith Schneider propeller was originally a design for a hydro-electric turbine. [2] Its Austrian inventor, Ernst Schneider, had a chance meeting on a train with a manager at Voith's subsidiary St. Pölten works; this led to the turbine being investigated by Voith's engineers, who discovered that although it was no more efficient than other water turbines, Schneider's design worked well as ...

  3. Fender (boating) - Wikipedia

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

    In boating, a fender is an air-filled ball or a device in other shape and material used to absorb the kinetic energy of a boat or vessel berthing against a jetty, quay wall or other vessel. [1] Fenders, used on all types of vessels, from cargo ships to cruise ships , ferries and personal yachts , prevent damage to vessels and berthing structures.

  4. Frame (nautical) - Wikipedia

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

    In steel shipbuilding, the entire frame can be formed in one piece by rivetting or welding sections; in this case the floor remains a separate piece, joining the frame on each side to the keel. Frame numbers are the numerical values given to the frames.

  5. Wingsail - Wikipedia

    en.wikipedia.org/wiki/Wingsail

    BMW Oracle Racing USA 17 from the 2010 America's Cup, with a rigid mainsail wingsail, and a conventional jib at the fore Forces on a wing (green = lift, red = drag).. A wingsail, twin-skin sail [1] or double skin sail [2] is a variable-camber aerodynamic structure that is fitted to a marine vessel in place of conventional sails.

  6. Port and starboard - Wikipedia

    en.wikipedia.org/wiki/Port_and_starboard

    Port side and starboard side respectively refer to the left and right sides of the vessel, when aboard and facing the bow. The port and starboard sides of the vessel always refer to the same portion of the vessel's structure, and do not depend on the position of someone aboard the vessel.

  7. Rudder - Wikipedia

    en.wikipedia.org/wiki/Rudder

    Generally, a rudder is "part of the steering apparatus of a boat or ship that is fastened outside the hull, " denoting all types of oars, paddles, and rudders. [1] More specifically, the steering gear of ancient vessels can be classified into side-rudders and stern-mounted rudders, depending on their location on the ship.