170621-N-SF508-218 ATLANTIC OCEAN (June 21, 2017) Navy Diver 1st Class Thomas Seymour, assigned to Mobile Diving and Salvage Unit (MDSU) 2, conducts drills on a simulated mixed-gas console while blindfolded during a unit level training exercise aboard MV Shelia Bordelon. MDSU-2 is the only east coast mobile diving and salvage unit and is headquartered at Joint Expeditionary Base Little Creek-Fort Story. (U.S. Navy photo by Mass Communication Specialist 2nd Class Charles Oki/Released)