The USS Volga was a Federation Danube-class runabout that was in service with Starfleet in the late 24th century, attached to Deep Space 9.
In 2372, the Volga was used in a botanical survey of Torad V in the Gamma Quadrant. Major Kira and the pregnant Keiko O'Brien were injured when the Volga was struck by an asteroid and one of their fuel pods exploded. (DS9: "Body Parts")
It was also to be used in response to an anticipated Dominion invasion in 2373. (DS9: "By Inferno's Light")