Changes

A lower Length to Beam (L/B) number indicates a beamier boat. Boats with a wider beam have better initial stability, and more interior room. They have worse ultimate stability, and high inverted stability, meaning it is hard to turn them upright. A beamier hull (L/B ratio below 2.7) has more room inside, but is less efficient and pounds much more going into head seas.<ref> Downeast Lobster Boats, http://www.downeastboats.com/hulldesign.html </ref> A beamier boat has less roll angle but more [[#Roll Acceleration|roll acceleration]], which is the primary culprit of seasickness. Even small changes in beam have a dramatic effect. <ref>http://www.kastenmarine.com/beam_vs_ballast.htm</ref> A narrow hull has better directional control and steers better. For boats from 30 to 50 feet in length a hull with an L/B ratio above 3.0 is more efficient and pounds less into head seas.