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I have followed this list quietly, without joining in any of the well reasoned or even unreasoned discussions. I feel that I have to jump in here. I have a significant amount of experience with deep air diving, in a controlled environment. While assigned to the Naval School Diving and Salvage in Washington DC (yeah I know I'm dating myself) we routinely conducted qualification and re-qual dives to 200' and 285' on air in our pressure complexes (wet pots). These were conducted in surface supplied rigs (MK-V and MK12) in about 8' of water, pressed down to the appropriate pressure. The work load was very low with all the descent/ascent and deco being handled by a Navy Master Diver standing outside the wet pot. In this environment the effects of deep air could be experienced with minimal risk. We certainly had no risk of losing a regulator or making a mistake in air management. My personal observation as a diver was that at 200fsw I was significantly affected by N2 every time. With no demands or stress I was able to accomplish simple tasks relatively well. I could easily see how even moderate tasking would have been very challenging. At 285fsw we observed that students had much more difficulty as you would expect. Interestingly enough, we experienced relatively few DCS cases after 285 runs in the wet pot, but probably had one case a month from 285 chamber runs (usually Type I DCS). Now given this highly controlled environment, what could one conclude about deep air in less controlled, more demanding situations? STUPID, STUPID, STUPID!! B.L. FLANK > -----Original Message----- > From: Jammer Six [SMTP:jammer@oz*.ne*] > Sent: Monday, July 20, 1998 10:15 PM > To: Tech List > Subject: Re: PA Quarry Near Drowning - Deep Air the culprit??? > > On 7/20/98 12:23, Frank Richard Lavallee, lavalle7@gt*.ne* posted: > > >JammerSix: > > > > By WKPP's standards, you are a Stroke if you dive below 100 feet on > >air(I hear they are changing that to 70 feet). > > > > Well, from one Stroke to another, it is all hogwash. I have air > dived > >in the 180 - 200 feet depth range for years without problems, as have > many > >others. > > > > I now dive Trimix though if I go below 200 feet, especially in a > cave. > > > > > >Frank Lavallee > > I'm sure you're right, Frank. Your record speaks for itself. > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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