This scout ship was a craft used by the Rebel Alliance for reconnaissance missions.
Luke Skywalker piloted it to search for a new Rebel base once the secret location on Yavin 4 had been compromised. Luke thought he found a candidate world in the Drexel system, but his hopes were dashed when his ship was forced down to the planet by Governor Quarg's jamming equipment.
The ship splashed onto the water covered surface of Drexel and the craft eventually sunk beneath the surface.
Though this ship bears a resemblance to the CR90 corvette, its size is apparently significantly smaller. The exact class and type remains a mystery, though it also bears a resemblance to the XS-800 light freighter.