160923-N-SF508-429 KEY WEST, Fla. (Sept. 23, 2016) Navy Diver 1st Class Calum Sanders, right, assigned to Mobile Diving and Salvage Unit (MDSU) 2, Company 2-3, attaches a tending line to a diver during a simulated anti-terrorism force protection dive training evolution. The evolution is part of Company 2-3’s two-week final certification exercise. MDSU 2, the only east coast mobile diving and salvage unit, is headquartered at Joint Expeditionary Base Little Creek-Fort Story. (U.S. Navy photo by Mass Communication Specialist 2nd Class Charles Oki/Released)