The Sounder Flats computer complex On the planet Ruul, Sounder Flats hosted a computer complex. This region of Ruul, known for its rugged hills and profound canyons, presented considerable navigational challenges to reach the flats. Furthermore, two heavily fortified Imperial bases were situated in this area. Prior to the Battle of Endor, Rebel general Brenn Tantor launched an information raid that successfully targeted both the bases and the computer complex.