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Beam – A measure of the width of the ship. There are two types: Beam, Overall (BOA), commonly referred to simply as Beam – The overall width of the ship measured at the widest point of the nominal waterline. Beam on Centerline (BOC) – Used for multihull vessels. The BOC for vessels is measured as follows: For a catamaran: the ...
A ship's draft/draught is the "depth of the vessel below the waterline measured vertically to the lowest part of the hull, propellers, or other reference point". [1] That is, the draft or draught is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed.
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 ...
Greater beam and draft produces a larger wetted surface, thereby causing higher hull drag. In particular, any "displacement" or non-planing boat requires much greater power to accelerate beyond its hull speed , which is determined by the length of the waterline, and can be calculated using the formula: Vmax (in knots) = square root of LWL (in ...
Beam Draft Example Ultra Large Container Vessel (ULCV) 14,501 and higher 1,200 ft (366 m) and longer 160.7 ft (49 m) and wider 49.9 ft (15.2 m) and deeper With a length of 400 m, a beam of 59 m, draft of 14.5 m, and a capacity of 18,270 TEU, ships of the Maersk Triple E class are able to transit the Suez canal. [35]
Beam is the beam, in feet. Depth is the depth of the hold, in feet below the main deck. The numerator yields the ship's volume expressed in cubic feet. If a "tun" is deemed to be equivalent to 100 cubic feet, then the tonnage is simply the number of such 100 cubic feet 'tun' units of volume.
Hogging is the stress a ship's hull or keel experiences that causes the center or the keel to bend upward. Sagging is the stress a ship's hull or keel is placed under when a wave is the same length as the ship and the ship is in the trough of two waves.
The process of determining a vessel's displacement begins with measuring its draft. [3] This is accomplished by means of its "draft marks". A merchant vessel has three matching sets: one mark each on the port and starboard sides forward, midships, and astern. [3] These marks allow a ship's displacement to be determined to an accuracy of 0.5%. [3]