Starbase 6 was a Federation starbase administered by Starfleet from the 2260s to the 2360s. It was commanded by Commodore Enwright in 2268. (TOS-R: "The Ultimate Computer") The planet Gravesworld was located near the base. (TNG: "The Schizoid Man")
On stardate 4307.1, Starbase 6 lost contact with the Intrepid and a rescue priority was issued to the USS Enterprise, which was already en route to the starbase. Following their investigation, the Enterprise returned to the base for a scheduled layover and shore leave. (TOS: "The Immunity Syndrome")
Later that year, the Enterprise traveled to this base, where it rendezvoused with the USS Lexington, and was ordered to be refitted with the M-5 multitronic unit. All but twenty of the Enterprise's crew was offloaded to this base, where they were kept in a security holding area, while the ship proceeded to participate in a series of M-5 drills. (TOS-R: "The Ultimate Computer")
In the 2270s, Starbase 6's Class F shuttlecraft Conrad was departing from the San Francisco air tram station just as Admiral James T. Kirk's air tram was arriving. (Star Trek: The Motion Picture Director's Edition)
In 2365, the USS Enterprise-D traveled to Starbase 6 from Gravesworld, following the death of Doctor Ira Graves, to drop off Kareen Brianon so she could arrange transport back to Earth. (TNG: "The Schizoid Man")
- See: Starbase 6 personnel
In the original version of this episode, Commodore Enwright's starbase was simply a reuse of the Deep Space Station K-7 studio model from "The Trouble with Tribbles", and was never identified by name.
In the remastered 2008 version of this episode, the station was given a new design, and a formal designation printed on the base which read "Starbase 6." Information pertaining to the update was obtained from Michael Okuda.
Based on the station's seemingly close proximity to Alpha Carinae II, it would seem that this starbase is in, or is relatively near the Beta Quadrant.