Beam (nautical) Totally Explained

Everything about Beam Nautical totally explained

The beam of a ship is its width at the widest point, or at the mid-point of its length. Generally speaking, the wider the beam of a ship (or boat), the more initial stability it has, at expense of reserve stability in the event of a capsize, where more energy is required to right the vessel from its inverted position. Typical length-to-beam ratios for small sailboats are from 2:1 (dinghies to trailerable sailboats around ) to 5:1 (racing sailboats over ). Large ships have widely varying beam ratios, some as large as 20:1. Rowing shells designed for flatwater racing may have length to beam ratios as high as 30:1, while a coracle has a ratio of almost 1:1 - it's nearly circular.
   I have found as a general rule of thumb that most monohulls from 6m (20') to 250m (820') have a beam that can be very roughly calculated by the following forumla:
Beam = LOA (Length Overall) in feet to the power of 2/3
   Some examples -
   For an 8.23m (27') long yacht: the cube root is 3, and 3 squared is 9. The beam will normally be about 2.75m (9').
   For a 19.5m (64') long yacht: the cube root is 4, and 4 squared is 16. The beam will normally be about 4.9m (16').
   For a 226m (741') long ship: the cube root is 9, and 9 squared is 81. The beam will normally be about 24.7m (81') for example Seawaymax.

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