Yacht Design - Version 1.7 Yacht Design V 1.7 uses 3D color bar graphs for comparing sailboats. Yacht Design is a tool to get a feeling for the sailing characteristics of a boat. It runs on a IBM compatible PC running Windows 3.1 or newer. Yacht Design computes a boat's sail area displacement, displacement length ratio, hull speed, ballast displacement, motion comfort and screen numbers. All the formulas are fully explained under Help.