*The Excelsior Class vessel has remained in use longer than almost any other vessel in Starfleet. Built nearly 75 years before the current Galaxy class, the Excelsior class has proven its usefulness in serving the Starfleet as an outstanding exploratory vessel well beyond its designed parameters. Although the Excelsior class was originally built for a Transwarp drive prototype propulsion system, the failure of Transwarp did not preclude the use of this design-worthy spaceframe, and more efficient warp drive engines were retro-fitted to Excelsior class ships. *Source: Back of card