170815-N-CW570-0081 GUAM (September 15, 2017) Navy Divers assigned to Mobile Diving Salvage Unit (MDSU) 1 and the Sri Lanka navy walk on the ocean floor in KM37 surface-supplied diving helmets 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)