The IKS Che'gra was a B'rel-class light warship that saw service with the Klingon Defense Force during the 23rd century. (Ship Recognition Manual, Volume 4: Starships of the Original Series Era) In 2293, the Che'gra was equipped with an experimental cloaking device that allowed it to fire while cloaked. General Chang utilised this ship in the conspiracy to sabotage the Federation-Klingon peace treaty. (Ship Recognition Manual, Volume 4: Starships of the Original Series Era; Star Trek VI: The Undiscovered Country) General Chang's Bird-of-Prey was not named in the movie.