The IKS Qo'rok' was a Kel'var-class heavy frigate that saw service with the Klingon Empire during the 24th century. (Ship Recognition Manual, Volume 3: Ships of the Klingon Empire)
In 2373, the Qo'rok discovered an incursion into Klingon space by Cardassian forces. The Qo'rok was able to delay the Cardassian forces long enough for a Klingon fleet to respond.
| Kel'var-class starships |
|---|
| IKS Dujtal - IKS Gh'rota - IKS Kel'var - IKS Qo'rok |