Mailing List Archive Mailing List Archive
Is the use of high PP02's to reduce "no deco time" a mistake? No, not in the context of rec diving, adding 5 or 10 min so your "no deco" time is not all that bad. But you are posting to techdiver and I assume you are not talking about rec diving. And in that context those who push the PP02 limits at the bottom in an attempt reduce deco at the top are screwing up their lungs and risking a tox. It is safer to do your bottom time at low PP02's and then use an appropriate nitrox or O2 to deco off of at your resting deco stop where you are attached to a line and are close to support.If you are talking saftey, this is the correct thing to do. Notice that I have not mentioned "trimix" once. This crap of using bottom nitrox to do 130+ dives is insane. You do what it takes to keep your EAD and PPO2's down, and if that means using helium, then that's what you do. You plan your dive using EAD and PPO2 limits and use whatever appropriate gasses it takes to achieve these limits. Or you don't do the dive. Can't you get this through your head?? Jim Sender: vpg Date: 2/26/98 10:46 AM >So what are you saying Nitrox diving is a bad thing? we should not use >nitrox? So IANTD/TDI/BSAC have all got it wrong? so I should not bother >learning nitrox just go straight on to trimix? we should all use trimix at >20 metres? > >> -----Original Message----- >> From: Jim Cobb [mailto:cobber@ci*.co*] >> Sent: Friday, February 26, 1999 2:30 AM >> To: vpg@li*.ne*; Tech Diver >> Subject: Re: Rob Palmers death >> >> >> You want backlash, eh? Well, this statement of yours is just a bunch of >> nitrox propaganda BS which is taught only by the worse, most clueless >> agencies. >> >> The goal, knucklehead, is to keep your PP02 as low as possible during the >> working portion of your dive and then use a higher PP02 nitrox or 02 for >> accelerated deco. Keeping your PPO2 at the high end for the entire dive >> will fry your lungs and risk a tox. >> >> What agency and instrokter trained you? This I would like to know. >> >> Safety results from proper dive planning a "clear head" BEFORE you get in >> the water. The gases are simply what is needed for the dive and >> contribute nothing to the safety. If your EAD is deeper than 130', then >> clearly your dive plan is not safe. If your PP02 exceeds 1.02 in the >> working portion then your dive is not safe. >> >> Exposing nitrox as some sort of magical substance which can perform >> miracles like you state is a bunch of dangerous bullshit and it seems to >> me, my friend, that you need to go back to the drawing board before you >> kill somebody. >> >> Jim >> >> Sender: vpg Date: 2/25/99 12:58 PM >> >> >Yes he died at 120+ metres on air, in fact while attempting a new world >> >depth record for diving on air. >> > >> >I have just come back from the Red Sea were he died and the above was >> >confirmed but that is not an argument against the use of air on >> "deep dives" >> >as such. The effects of high partial pressures of 02 is well known, its >> >effects are fact and not worth discussing at this level, diving >> to 120+ on >> >air defies logic. >> > >> >Were the discussion or arguments should centre are on the divers >> who dismiss >> >alternative gas mixtures including Nitrox for dives in the >> 20/30/40/50/60+ >> >metre ranges. The use of Nitrox would improve safety, allow a >> clearer mind >> >during a dive and reduce post dive fatigue. Unfortunately most divers >> >dismiss alternatives to air without learning the facts or benefits to be >> >gained, its a case of closed minds. One of the reasons to resist >> Nitrox by >> >average club divers seems to be the need for planning and >> discipline ( i.e., >> >planning your depth in advance to allow mixing your gas) but >> they should see >> >this as a positive thing. >> > >> >Just my thoughts, I await the backlash.......... >> > >> >-- >> >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >> >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. >> > >> >> >> ------------------------------------------------------------------- >> Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html >> >> >> -- >> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. >> > > ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]