Semi-Displacement Hull Speed Calculator

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The semi-displacement hull speed calculator estimates the performance window for hulls engineered to climb partially over their own bow wave. While traditional displacement hulls have a hard limit at a Speed-to-Length ratio (S/L) of 1.34, semi-displacement vessels efficiently operate across an S/L ratio range of 1.4 up to 2.5.

Waterline Length / LWL (Feet)

Target Speed-Length Ratio (S/L)

Calculate Hull Speeds