Captain Chris Murray, Supervisor of Diving at Naval Sea Systems Command in Norfolk, VA, takes his MK-21 Dive Helmet off after completing the in-water phase of his dive. Murray now has five minutes to get undressed and enter the recompression chamber where the air pressure around him will be brought to a depth of 50 feet (about 15,2 metres); this is done to avoid decompression sickness. He will spend an hour and forty-five minutes in the recompression chamber to allow his body to off gas.

Official U.S. Navy photo by Photographer’s Mate Second Class Petty Officer (DV) Eric Lippmann

Obtained from the US government site: http://oceanexplorer.noaa.gov/explorations/monitor01/logs/aug16/media/diver2.html

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