An early Earth starship, said to be the first to have warp drive installed, which disappeared on its third voyage and was found centuries later in the Delta Triangle.
The Bonaventure is seen in The Time Trap, an episode of the animated Star Trek series. Its outline resembles a smaller, earlier relative of the Constitution class.
When the Enterprise and the Klingon cruiser Klothos are drawn into the pocket universe of the Delta Triangle, they find themselves in a graveyard of ships from many ages and peoples. Scott picks out the Bonaventure at once, calling it the first ship to have warp drive installed and recalling that it vanished without trace on its third voyage.
Descendants of the crews trapped there over the centuries formed the Elysian Council, a peaceful society of 123 species. The episode's claim about warp drive sits awkwardly with the later account of Zefram Cochrane's Phoenix.