Navy Petty Officer 1st Class Matthew Greiner checks a transportable recompression chamber before a dive in Savannah, Ga., Aug. 14, 2015. Greiner is assigned to Mobile Diving and Salvage Unit 2. Navy divers assigned to the unit and Explosive Ordnance Disposal technicians assigned to Mobile Unit 6 worked with archaeologists, conservationists, members of the Naval History and Heritage Command and the Army engineers on a Navy project to salvage and preserve the CSS Georgia steamship. U.S. Navy photo by Petty Officer 1st Class Blake Midnight