The Na Ra'den-class (known in translation from Klingonaase as the Carrier of Doom-class, alphanumeric designation T12-class) was a Klingon class IX assault starship in Imperial Defense Force service in the 23rd century, becoming active on reference stardate 2/1405. These vessels were produced, about 14 per year, at Fonawl, Iosia and Mustaka, and were the largest assault ships in the Klingon navy at the time of their commission.