Noteworthy , when plotting speed vrs. drag, is an additonal 'real world' factor, wave height. While this graph does not reflect factors of wave height, all prior-art vessel designs, except Hydro Lance (HARTH technology), will have the need , to significantly reduce speeds, as the sea state, or wave heights, rise with adverse weather conditions. The reason for this design achievement difference, is that conventional designs, have unlimited free-board, causing such vessels to follow, or crash into, the ocean contours. The Hydro Lance has limited free-board, and a geometry to average ocean contours, thus reducing hull stress, averaging ocean contour bouancy variations to a constant, high stability (no sea sickness), and by also gaining reduced drag (reduced cross section and wetted surface reduction), the result is coindental to greater fuel efficiencies.