An experimental prototype that was designed for deep space and tactical based assignments, the Prometheus was built at the Beta Antares shipyards and launched on stardate 50749.5 and at the time was the most innovative and fastest vessel in the fleet. (Startrek.com) In 2377, the Prometheus was part of the fleet that destroyed Sphere 634 and welcomed Voyager back home. (VOY episode: "Endgame") Following the invasion, the Prometheus reported to Starbase 22, where the station's counselor, Brian Ellis, counselled the Prometheus medical staff. (ST novel: A Singular Destiny)