The IRW Chilvas is a Romulan Warbird assigned to the Maelstrom under the command of Captain Terrik. In 2378, with the help of the IRW Soryak, it attacked the USS Sovereign, USS Dauntless, IKV Rankuf, and IKV Trayor in the Tevron system. Later it worked with the Sovereign, USS Geronimo, and IKV Ho'hegh to destroy station Litvok Nor at Alioth VI. (ST video game: Bridge Commander)