A method is presented to predict the roll restoring moments acting on hard-chine craft operating at planing speeds, which can be used to evaluate the dynamic roll stability of these vessels. Expression are developed for the static and dynamic contributions to the restoring moment. Tests were conducted to measure the restoring moment on five different planing hull models. The predictions for these hulls compare well with the experimental results.

Keywords:
marine transportation, hull, stability, patrol boat, june 1996, roll stability, contribution, coefficient, expression, stevens institute
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1996. The Society of Naval Architects and Marine Engineers
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