Raptor 305 is one of Galactica's remaining Raptors after a Cylon force attacks three Raptors, destroying one and forcing a second, Raptor 1, to crash-land on Kobol (TRS: "Kobol's Last Gleaming, Part I").
Raptor 305 is cannibalized for parts for the two Raptors that participate in the SAR for Raptor 1 on Kobol (TRS: "Fragged").