The vessel was named after Terix, who served the Empire during the Earth-Romulan War. (ENT novels: Kobayashi Maru, Beneath the Raptor's Wing, To Brave the Storm) In the year 2370, Terix was commanded by Sirol. (Star Trek Encyclopedia, ST:CCG: Q-Continuum, Decipher RPG module: Starships) In 2370, the Terix investigated reports of an illegal Federation cloaking device. The device was discovered by the crew of the USS Enterprise-D, and turned over to the Romulans in order to allieviate the potential diplomatic fallout. (TNG episode: "The Pegasus")