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The waterline is the line where the hull of a ship meets the surface of the water. A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position. Hence, waterlines are a class of "ships lines" used to denote the shape of a hull in naval architecture lines ...
A vessel's length at the waterline (abbreviated to L.W.L) [1] is the length of a ship or boat at the level where it sits in the water (the waterline). The LWL will be shorter than the length of the boat overall ( length overall or LOA) as most boats have bows and stern protrusions that make the LOA greater than the LWL.
The load line is a waterline that corresponds to the maximum draft of the ship, thus yet another name, load waterline. [2] Varying water temperatures will affect a ship's draft , because warm water is less dense than cold water, providing less buoyancy.
A ship class is a group of ships of a similar design. [1] This is distinct from a ship type, [1] which might reflect a similarity of tonnage or intended use. For example, USS Carl Vinson is a nuclear aircraft carrier (ship type) of the Nimitz class (ship class). In the course of building a class of ships, design changes might be implemented.
The carpenter's walk allowed the ship's carpenter to tour the entire waterline area of a ship to inspect it for water leaks. [37] [38] Because of its dark and seldom-visited nature and location far below decks, it was also sometimes used by mutinous sailors as a secluded place to plan a rebellion against the ship's officers. [39] carrack. Also nau.
Hull speed – Speed at which the wavelength of a vessel's bow wave is equal to the waterline length; Lift (force) – Force perpendicular to flow of surrounding fluid; Monohull – Type of boat or ship having only one hull; Multihull – Ship or boat with more than one hull; Naval architecture – Engineering discipline of marine vessels
A heavily modified or repurposed ship may receive a new symbol, and either retain the hull number or receive a new one. Also, the system of symbols has changed a number of times since it was introduced in 1907, so ships' symbols sometimes change without anything being done to the physical ship.
Drawing on a 1935 empirical formula for predicting a ship's maximum speed based on scale-model studies in flumes of various hull forms and propellers [N 5] and a newly developed empirical theorem that related waterline length to maximum beam, the Navy drafted plans for a battleship class with a maximum beam of 108 ft 2 in (32.97 m) which, when ...