The Amarcan-class was a type of warbird fielded by the Romulan Star Empire's Grand Fleet in the mid-24th century. The Amarcan-class was the direct predecessor of the famed D'deridex-class warbird of the 2360s and 2370s, and likewise featured a double-hull design. It was twenty percent larger than previous warbird classes and had more graceful lines than the Klingon-designed K't'inga-class battlecruisers still in use by the Grand Fleet at that time. They were estimated to have three times the combat capabilities of Federation Constellation-class heavy cruisers. (ST novel: Vulcan's Heart)