These were one of the largest vessels in the Klingon Defense Force at that time, second only to the Sword of Kahless class battleships. At over 600 meters in length, the pumwI' were massive brutes that possessed five warp nacelles, and a large array of weapons which were used to strike fear into the hearts of the enemies of the Klingon people. They were, at the time, one of the strongest Klingon vessels known but were rare in number due to the expense in actually constructing one of these juggernauts.
Typically, the Accuser served as a command and control ship which meant it was never seen alone but as part of a squadron that consisted of B'rel class birds of prey and D7 class cruisers. This position of importance meant only the best of commanders would hope to control such a powerful craft. Many Klingon warriors remarked at this vessel and noted that it was the most elegant and perhaps beautiful of warships.
The one disadvantage of the pumwI' was their slow speed, making it somewhat easy for enemy starships to escape a confrontation with them. Despite this, the pumwI' was quite maneuverable for a ship of its size. It also possessed a large amount of disruptor arrays, trilithium-depleted photon torpedo launchers, and an antimatter field projector. This gave the Accuser an extremely devastating punch at any range. Furthermore, the Accuser was equipped with a cloaking device which made it the largest Klingon vessel at the time that was capable of cloaking.
The Accuser was created to work in conjunction with the Sword of Kahless class battleships and, together, replaced the unsuccessful Ber'taa class advanced heavy cruisers. Many of the problems with its predecessor model are believed to have been corrected by Klingon engineers.
At the beginning of the year 2293, thirty of these vessels were in service with twelve more under construction. The fate of the class following the shift in budgetary priorities after the explosion of Praxis has not been specified. (TOS video game: Klingon Academy)