The Best Hull Designs for Heavy Weather Sailing

The hull is the external part of the boat that forms the boat's body and keeps water from rushing inside. There are several factors to take into account when deciding on a hull design. Some of these factors are significant to questions surrounding heavy weather sailing safety.

  1. Length

    • For heavy weather sailing, it is best to use a hull design that has a long overall length. Large breaking waves often have more than enough strength to capsize a boat. This is particularly true if the height of the wave is a greater distance than the length of the sailboat. If a wave is higher than a boat is long, the boat cannot go over the wave.

    Beam

    • Sometimes, sailboats are hit on the beam by a heavy breaking wave. When this occurs, the boat is susceptible to capsizing. However, boats with a narrower beam are often able to resist capsizing. Because wider beams offer more living space below deck, it is important to balance safety with luxury. If safety is your primary interest, choose a hull design with a narrow beam.

    VCG

    • VCG refers to the boat's "vertical center of gravity." The vertical center of gravity can be lowered by adding weight from the end of the keel. It can be heightened by removing weight from the end of the keel. A low vertical center of gravity will allow the boat to right itself more easily in the event of a capsize. If you are concerned about safety in heavy weather sailing, choose a hull with lots of weight on the end of the keel.

    Angle of Vanishing Stability

    • The angle of vanishing stability is the angle at which the boat can heel and still be able to right itself. To be more confident of the boat's ability to right itself, choose a hull with a stability angle of 140 degrees or more. Dingies have a stability angle of about 80 degrees. Inland water boats have a stability angle of about 100 degrees. Typically, only offshore boats have a stability angle in the right range, usually starting around 120.