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post #12 of Old 10-04-2010
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John Vigor wrote a book on seaworthy boats. Small cockpits with a high bridge to prevent water in the cockpit from going below helps. Companionway hatch boards that lock in place. As to beam a wide beam introduces form stability while a narrow beam boat uses ballast. Some boats with wide beam are almost as stable inverted as upright ..think twin hulls. The general ideal is that a narrow boat will roll faster before flooding. The capsize ratio is a measure but also there are much more accurate ways to measure a boat's righting ability. My boat has a capsize ratio of about 1.7. Many Catalinas are greater than two. In general a boat with a CR greater than two is thought less seaworthy and more of a coastal boat.
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