Posted by Chris on March 21, 2005 at 10:15:30:
In Reply to: Diving mixed gas with reliable results posted by Super tech on March 21, 2005 at 10:08:25:
33% CO2
33% N2
33% He
The complete lack of O2 in your mix would allow for "allow for incredibly long immersion" since there is no time limit when your dead!