In the year 2267, she was serving as the communications officer aboard the Federation starship USS Defiant when it encountered the cloaked IKS Kretoq. (ST - Seven Deadly Sins novella: The First Peer) In 2268, Sabapathy was still on the Defiant when the ship was lost in interphase. (TOS episode & Star Trek 5 novelization: The Tholian Web; VAN novel: What Judgments Come)