170815-N-CW570-0065 GUAM (Aug. 15, 2017) A Sri Lanka navy diver walks on the ocean floor in a Mobile Diving Salvage Unit (MDSU) 1 KM37 surface-supplied diving helmet during a diving subject matter expert exchange (SMEE) at Naval Base Guam. MDSU-1 conducts SMEEs to strengthen the relationship and understanding between SLN and U.S. Navy divers through surface-supplied and SCUBA diving operations. (U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Arthurgwain L. Marquez/Released)