Varna, Bulgaria (June 14, 2004) - A Master Diver from Mobile Diving and Salvage Unit Two (MDSU-2) provides safety instructions to a member of the Bulgarian Navy during a recent dive exercise. MDSU-2 and crew members assigned to the Military Sealift Command (MSC) ocean tug USNS Apache (T-ATF 172) spent several days in Varna promoting reciprocal security interests in Black Sea countries and enhancing mutual understanding of diving and salvage operations. U.S. Navy photo (RELEASED)