NCC-1717

The USS Yorktown, registry NCC-1717, was a Federation Starship, Constitution-Class, in service during the 23rd century. It was later decommissioned and made a museum ship, permanently docked at Starbase 178. Starfleet Officer Captain Montgomery Scott stole the ship in the 24th century in his attempt to rescue Ambassador Spock, who had been captured and held prisoner in the Romulan planet Constanthus. Its damaged bridge module had been replaced with the one taken from the USS Enterprise NCC-1701 during its refit in 2270. (Pocket books - Star Trek: TNG - Crossover)