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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). LOA is usually measured on the hull alone. [2] For sailing ships, this may exclude the bowsprit and other fittings added to the hull.
Complement – The full number of people required to operate a ship. Includes officers and crew; does not include passengers. The number of people assigned to a warship in peacetime may be considerably less than her full complement. Cube – The cargo carrying capacity of a ship, measured in cubic metres or feet. There are two common types:
[8]: 10 [9] The most common chart size was early established as the "Double-elephant", about 39 X 25.5 inches, and this has continued to be the case. [10] Chart design gradually simplified over the years, with less detail on land, focusing on features visible to the mariner. Contours were increasingly used for hills instead of hatching.
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 ...
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 ...
The word 'ton' and hence 'tonnage' originates from the word 'tun' which is a measure of volume equivalent to the size of a barrel which could contain 252 gallons of wine. In the UK, merchant sailing vessels were historically measured using Builder's Old Measurement to measure tonnage and taxed accordingly.
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On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points. Most charts include a compass rose depicting the variation between magnetic and true north. However, the use of the Mercator projection has drawbacks. This projection shows the lines of longitude as parallel.