151207-N-ZZ999-049 ATLANTIC OCEAN (Dec. 7, 2015) -- George Schwarz, an underwater archaeologist with Naval History and Heritage Command, and Charlie Buffum survey the potential wreck site of USS Revenge in the Atlantic Ocean off the coast of Watch Hill, R.I., Dec. 7, 2015. The site was first discovered by local divers Charlie Buffum, Craig Harger, and Mike Fournier in August 2005. With the use of Buffum?s 20-ft fishing boat, the team towed NHHC?s marine magnetometer, an instrument capable of detecting ferrous materials on the seafloor by recording variations in the magnetic field. These variations can indicate the presence of iron artifacts such as cannon, anchors, shot, ballast, and other objects that might otherwise be undetectable in sonar surveys. Revenge, a schooner commanded by Commodore Oliver Hazard Perry, ran aground on Jan. 9, 1811 in heavy fog. Buffum and Craig Harger discovered the possible Revenge wreck in August 2005. (U.S. Navy photo by Heather Brown/Released)