Calling the view "absolutely beautiful," a scientist took the one-man minisub Deep Rover into the clear blue waters of Crater Lake on its first test dive Thursday.

Oregon State University researcher Jack Dymond was at the controls as the $1 million craft dove 200 feet in a shallow area of the lake to study a dacite dome, a type of lava dome the U.S. Geological Survey wanted explored, said Jack Thompson, chief ranger of the national park."He said it was fantastic, absolutely beautiful," Thompson said. "At about 140 feet, he could see the bottom with available daylight, 50 feet below him."