The early 1980s witnessed the birth of the first generation Autohydro by Coastdesign Inc. (now called Autoship Systems Corporation (ASC)). Autohydro was one of a very few PC-based first principles stability and longitudinal strength programs available on the market of the day. Running in DOS, Autohydro quickly became world-renowned as a robust, dependable design and analysis tool for the creation of trim and stability books. Even today, some users of these early versions of Autohydro call ASC asking for advice. Since those early times, ASC has continued to improve Autohydro. The most recent release, Autohydro 6.0, includes many new features that hundreds of naval architects around the world rely on for their hydrostatic and strength calculations.