Some modern coastal cruisers and many racing designs have problems meeting this criteria. An interesting note, the study concluded that static stability was relatively unimportant in predicting dynamic capsize. Beam and weight were much more important factors. Wide boats give waves a longer lever arm to initate roll and light weight boats require less energy to roll over. An empirical term developed by yacht designer Ted Brewer.
Large numbers indicate a smoother, more comfortable motion in a sea way.
The equation favors heavy boats with some overhang and a narrow beam. These are all factors that slow down the boat's response in violent waves. A value of 30 - 40 would be an average cruiser. Racing designs can be less than 20, and a full keel,Colin Archer design, could be as high as 60. Inc. Additionally, this material has not been reviewed by Catalina Yachts, Inc. for technical accuracy.