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Definitions. 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 ...
Beam (nautical) 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 ...
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. It is the most commonly used way of expressing the size of a ship, and is also used for calculating the cost of a marina berth [1] (for example, £2.50 per metre LOA).
The capsize screening formula (CSF) is a controversial method of establishing the ability of boats to resist capsizing. It is defined for sailboats as: Beam / ( (Displacement /64.2) 1/3), with Displacement measured in pounds, and Beam in feet. A lower figure supposedly indicates greater stability, however the calculation does not consider ...
Builder's Old Measurement (BOM, bm, OM, and o.m.) is the method used in England from approximately 1650 to 1849 for calculating the cargo capacity of a ship. It is a volumetric measurement of cubic capacity. It estimated the tonnage of a ship based on length and maximum beam. It is expressed in "tons burden " (Early Modern English: burthen ...
A widebeam is built in the style of a cruising narrowboat, that is to say, a steel-hulled barge used mainly by leisure boaters. [ 4] Typically, this entails a bow well-deck with doors leading aft to the living accommodation. The long saloon typically has numerous side-windows, and while its coachroof may have fitments such as solar panels and ...
The draft or draught of a ship is a determined depth of the vessel below the waterline, measured vertically to its hull 's lowest—its propellers, or keel, or other reference point. [1] Draft varies according to the loaded condition of the ship. A deeper draft means the ship will have greater vertical depth below the waterline.
Detailed hull dimensions. 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.