150710-N-PO203-346 VIRGINIA BEACH, Virginia (July 10, 2015) Two teams from Old Dominion University in Norfolk, Va., take part in a practice session during the international RoboBoat competition being held in Virginia Beach, Va. During the event, sponsored by the AUVSI Foundation and Office of Naval Research, student teams race autonomous surface vehicles of their own design through an aquatic obstacle course. (U.S. Navy photo by John F. Williams/Released)