The USS Sovereign, registered to Star Fleet under the Naval Construction Contract number NCC-75000, was a Type II Exploration Dreadnought, the sixth Class One capital starship to bear the name Sovereign, and the prototype for the Sovereign-class starships used by Star Fleet in the late 24th century. At the time of her launch, the Sovereign was one of the most advanced of all Class One capital starships that were in service to the United Federation of Planets. (Star Fleet International)