In the fictional world of Star Trek, the Utopia Planitia Fleet Yards is a large Federation shipyard in synchronous orbit over Utopia Planitia on Mars. The facility is known for the development and construction of starships and its dry dock facilities. Notable ships produced by the shipyard include the USS Enterprise (NCC-1701-D), the USS Galaxy (NCC-70637), the USS Defiant (NCC-74205, ex-NX-74205), the USS Voyager (NCC-74656) and the USS Sao Paulo (NCC-75633). Captain Benjamin Sisko served at Utopia Planitia for two years from 2367 to 2369, overseeing the development of the Defiant class starship. In 2371, the starship Fredrickson (NCC-42111) underwent a refit at Utopia Planitia.