Amarcan class

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 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 battlecruisers still in use by the Grand Fleet at that time. They were estimated to have three times the combat capabilities of Federation heavy cruisers. 

In 2351, Velal tr'Hrienteh deployed a pair of Amarcan-class warbirds, and, under the command of Satali t'Tyrava, to reinforce the  after its commanding officer Telek R'mor received a transmission from what he believed to be a cloaked Federation starship near his location. This was in fact USS Voyager, transmitting through a wormhole from a point in the Delta Quadrant, twenty years in the future. ("")

In 2371, Alina t'Aimne compared the Vidiian starship the Vetar was pursuing to an Amarcan-class warbird in terms of firepower. When this proved confusing to Aman Evek she suggested a heavy frigate as a more current comparison. ("The Mysterious Case of Neelix's Lungs")