The IRW Kalath was a Khin'Vagh-class starship slated to enter Romulan service during the 25th century. It was one of the three Khin'Vagh-class ships slated for Romulan delivery as compensation for the non-delivery of the Klingon QeylIS BetleH-class battleship in the late 23rd century. (Star Trek: False Vacuum: "Wagon Train to the Stars")