I use EANx 80 for deco instead of 100% O2 for 2 reasons: The total CNS% for a long/deep dive can easily reach or exceed 100%. By using EANx 80 instead of 100% O2 for deco, the total CNS% will drop dramatically, and at the same time, it will add only a few additional minutes to your overall deco time in most cases. It is much easier to get a full fill to 3000 p.s.i. for your deco bottle from O2 banks(unless of course you have a booster pump, which most of us don't). Frank Lavallee, Plant City, Florida -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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