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For the International rule, the rating number is approximately equal to the sailing length of the hull. These boats have long overhangs which allow the waterline length to increase as the boat heels over. A displacement hull's maximum speed (the hull speed) is directly proportional to the square root of its waterline length. [2]
Cube – The cargo carrying capacity of a ship, measured in cubic metres or feet. There are two common types: Bale Cube (or Bale Capacity) – The space available for cargo measured in cubic metres or feet to the inside of the cargo battens, on the frames, and to the underside of the beams. It is a measurement of capacity for cargo in bales or ...
Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. This length is important while docking the ship.
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. As a ship becomes more ...
Lf represents the waterline length (LWL), S the measured sail area, D displacement. The principal restrictions are: Maximum length: 6.50 m; Minimum displacement: 600 kg; Draft: 1 m; Measured sail area : 30 m 2; Maximum cockpit area: 2 m 2; The LWL taken into account in the formula is at least of the 4/5 the length.
Mathematically, the Universal Rule formula as introduced in 1903 was: = [5]. Variables: L - Rated boat length, definition tweaked from year to year by the New York Yacht Club; S - Measured sail area, up to 1923 to British Navy method, then amended for 3/4 mast-height jibstay and foresails, after the 1928 IYRU London Conference same as Metre-boats of the International Rule.
is the length of the waterline in meters, is the hull speed of the vessel in meters per second, and is the acceleration due to gravity in meters per second squared. This equation is the same as the equation used to calculate the speed of surface water waves in deep water. It dramatically simplifies the units on the constant before the radical ...
The world's longest ships are listed according to their overall length (LOA), which is the maximum length of the vessel measured between the extreme points in fore and aft. In addition, the ships' deadweight tonnage (DWT) and/or gross tonnage (GT) are presented as they are often used to describe the size of a vessel.