180422-N-DS883-059 SANTA RITA, Guam (April 23, 2018) Master Chief Petty Officer of the Navy (MCPON) Steven S. Giordano looks into a hyperbaric chamber during a demonstration in the dive locker at Naval Base Guam, April 23, 2018. MCPON is on the island of Guam to continue strengthening his understanding and appreciation for the operational environment in the U.S. 7th Fleet and to raise awareness of Sailor 2025 initiatives and policy changes. (U.S. Navy photo by Mass Communication Specialist 3rd Class Heather C. Wamsley/Released)