Anthony B. Williams soon shall offer the SeaShip software package for personal computers.

SeaShip simulates motion of a numerical hull model in wind-sea and swell. It animates three-dimensional interactions between the ship and the waves with the graphics card in your personal computer. It shows changes in trim and motion that result from changing load or hull shape.

SeaShip needs two inputs, a numerical model of the hull, and a sea and swell spectrum. For the hull model, you supply an ordered mesh of triangular facets, with three-dimensional coordinates and normal vectors. You can also supply descriptions of the deck, superstructure, and other details for rendering. For the very best in ship models, go to www.aerohydro.com

To make the spectrum, we need your estimate of wind speed and direction, swell height and direction, and ship speed and direction. Alternatively, plan the course of your ship as a series of waypoints. SeaShip then obtains expected wave spectra along this course over the Internet. We provide these spectra by running the WaveWatchIII operational model, using winds predicted by the National Centers for Environmental Protection and provided twice daily over the Internet by www.ncep.noaa.gov

SeaShip generates an animated image of the ship in these seas that you can examine from any angle. It records all of the ship motions for the times that you specify, keyed to this animation, and provides a full statistical summary of the motions.

Requirements: Windows 2000 Professional Operating System, Intel Pentium 4 Processor, 256 MBytes RAM, 200 MBytes hard disc storage, CD-ROM, AGP graphics card with GeForce 2 Ultra, Internet connection. Trademarks belong to their respective owners.