| http://www.w3.org/ns/prov#value | - You would need to breathe nitrox on the way down and about 175' or less, start breathing like a 10% mix of oxygen, and Helium or other inert gas such as argon, stay down for a precise time then breath nitrox on way up after you are about 175'(depending on mixture) then decompress for a certain amount of time at various depths first at the halfway point, then at 50'. then 30' then 20' etc, using hig
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