From the introduction: From the most advanced exo-vehicle used for war to a trading ship that plies the vast trade lanes to a simple space craft that ferries gods between stations, the machines used in space are vital to the well-being of all who live there. In an attempt to show a wide cross-section of the vehicles that exist in the solar system, the Mechanical Catalog provides Gamemasters and Players with a wide variety of new vehicles to use in their games.