George, Can you put the issues of "counter diffusion" into language a Jarhead can understand? I was accosted this past week by a "Master Diver" who warned us that "If you have to take a chamber ride after breathing that shit (helium) it will kill you." I was so stunned by his position and attitude that I just nodded and listened. Plus, I have no idea what counter diffusion is, or if or why it is an issue to SCUBA divers. Scott -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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