The D2-class (known in Klingonaase as the V'kar Zadan-class, literally translated, Stingtongue-class) was a series of class VI Klingon destroyer starships in Imperial Defense Force service around the time of the 23rd century.
The Stingtongue vessels crewed 220, with room for ten passengers and one shuttlecraft, as well as two transporter rooms, two combat transporter stages and a single cargo transporter. They measure 205 meters in length, 135 meters in width and 30 meters in height, with a weight of 74,500 metric tons. The vessels have a cargo storage capacity of 30 SCU, or 1,500 metric tons. Control computers on board were of the ZD-5 type. The D2 had two KWC-1 warp nacelles, with a cruising speed of warp seven and a maximum speed of warp 8. The impulse engines were of the KID-1 type. The ships were armed with two KD-6 disruptors and two KP-2 torpedo launchers, and were defended by KSN type deflectors
The D2 series entered service with the D2A model on reference stardate 2/1201, with over one-hundred forty-six ships constructed over the "A" series lifetime. The "A" series was armed with a fore and aft torpedo launcher, while the "B" series featured both launchers facing forward. The D2B model was constructed with over one-hundred forty-four ships beginning on stardate 2/1206. Of the classes 290 vessels built by the 2280s, 20 were destroyed, 1 was captured by Romulans, 2 were missing, 1 was scrapped and two were sold into private service. The class was constructed at Iosia and H'renn at a rate of about 12 per month. (FASA RPG module: Klingon Ship Recognition Manual)