RIS Terix

The IRW Terix was a Romulan warbird in service in the 24th century, commanded by Commander Sirol. In 2370, the Terix investigated reports of an illegal Federation cloaking device. The device was discovered by the crew of the USS Enterprise, and turned over to the Romulans in order to allieviate the potential diplomatic fallout. (TNG episode: "The Pegasus")

Federation covert agent Mackenzie Calhoun later boarded the Terix in Romulan space, in order to destroy the device. (NF short story: "Loose Ends")