The K't'inga-class was a type of Klingon warship that entered service in the 23rd century and continued to serve in the Klingon fleet throughout the 24th century. The K't'inga-class entered service in the 2270s and was based on the older D7-class. (Star Trek: The Motion Picture) It was the most powerful warship fielded by the Klingon Empire for some time and one even served as the flagship of the Klingon Chancellor. (Star Trek VI: The Undiscovered Country) Its maximum evacuation capacity was 6,540. (Ship Recognition Manual, Volume 3: Ships of the Klingon Empire)