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  2. Propeller theory - Wikipedia

    en.wikipedia.org/wiki/Propeller_theory

    The momentum theory or disk actuator theory – a theory describing a mathematical model of an ideal propeller – was developed by W.J.M. Rankine (1865), Alfred George Greenhill (1888) and Robert Edmund Froude (1889). The propeller is modelled as an infinitely thin disc, inducing a constant velocity along the axis of rotation.

  3. Glossary of nautical terms (A–L) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    Typically used to assist in docking and undocking a boat, with its hook used to pull a boat towards a dock and the blunt end to push it away from a dock, as well as to reach into the water to help people catch buoys or other floating objects or to reach people in the water.

  4. Missing man table - Wikipedia

    en.wikipedia.org/wiki/Missing_man_table

    A missing man table, also known as a fallen comrade table, is a ceremony and memorial that is set up in military dining facilities of the United States Armed Forces and during official dining functions, in honor of fallen, missing, or imprisoned military service members.

  5. Chine (boating) - Wikipedia

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

    A chine in boat design is a sharp change in angle in the cross section of a hull. The chine typically arises from the use of sheet materials (such as sheet metal or marine ply) as the mode of construction.

  6. Displacement (ship) - Wikipedia

    en.wikipedia.org/wiki/Displacement_(ship)

    The ship's hydrostatic tables show the corresponding volume displaced. To calculate the weight of the displaced water, it is necessary to know its density. Seawater (1,025 kg/m 3 ) is more dense than fresh water (1,000 kg/m 3 ); [5] so a ship will ride higher in salt water than in fresh.

  7. Navigational instrument - Wikipedia

    en.wikipedia.org/wiki/Navigational_instrument

    Navigational instruments are instruments used by nautical navigators and pilots as tools of their trade. The purpose of navigation is to ascertain the present position and to determine the speed, direction, etc. to arrive at the port or point of destination.