The Bortas-class was designed by the engineers at the Ty'Gokor Fleet Yards at the command of Chancellor J'mpok. The Bortas was designed as the successor to the Negh'Var-class battle cruiser, which it dwarfed in size. Only slightly smaller than the Vo'quv-class carrier, the Bortas was one of the largest Klingon starships ever created, and certainly the largest that still maintained the ability to cloak. It was designed for both versatility and durability, being heavily armored, with recessed Bussard collectors.
An advanced variant, dubbed the Bortasqu'-class, was developed from the design, with three variants. The Bortas-class was equipped with an Advanced quantum slipstream drive and a cloaking device. (STO video game: Star Trek Online)