In 2367, the Vorn was the personal vessel of Duras, son of Ja'rod. Later, Worf (claiming the Klingon Right of Vengeance after the death of K'Ehleyr) killed Duras in armed combat aboard this starship. (TNG episode: "Reunion") It is never stated in the episode whether Duras was the actual commander of the vessel, or whether he was even a member of the Klingon Defense Force.