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The longer the dive, the lower the PPO2 and we break every 20 minutes during the deco to backgas until we go to oxygen - then we break every 12 minutes. I pretty much ignore the first dive when doing a second dive. If you did the deco right the first time, it shouldn't matter. All that repetitive dive nonsense is for poorly perfused people. The real risk of repetitive diving is the repetitive oxygen exposure, not DCS. So it's safe to say that if you did a serious dive the first time, you shouldn't be doing a second dive anyway. If you did a bullshit dive, who cares, you can do twenty of them. ----- Original Message ----- From: "Bryon Bertrim" <bryon@be*.co*> To: "Trey" <trey@ne*.co*>; <techdiver@aquanaut.com> Sent: Friday, July 06, 2001 7:40 AM Subject: Re: Your way > That was about it. I was trying to get a sense for what you called "Your > Way" deco profile and compare that to lets say JJs Deco Planner. From what > you are saying incorporate even deeper stops. > > follow up questions: > > How would you handle this now if you were going to do a 2nd dive to this > depth, I don't need to know every detail just the deltas. including SI > > How much damage do you believe is being done at hi PPO2s. How do you avoid > this on your med long deep dives, that you do all the time. Meaning i > understand record breaking stuff, your not doing those dives every day. i > cannot see how you can avoid it. Also your O2 window is off the scale as i > know it. Why are you not dead. Or a least your lungs burnt out. > > Do you always crank the He so high > I under stand why. what do you consider > your standard mixes. I know GUE and much lower than that. IE 16/47 upto 250. > > BB > > > > > > ----- Original Message ----- > From: "Trey" <trey@ne*.co*> > To: "Bryon Bertrim" <bryon@be*.co*>; <techdiver@aquanaut.com> > Sent: Friday, July 06, 2001 7:10 AM > Subject: RE: Your way > > > > > > What are you asking me? First, I would try to keep the time less than 30 > and > > even less than 25, meaning 25 starting the clock at the bottom. I would > use > > 50-90% helium, 10-14% oxygen. I would use 50/50 and oxygen to deco on, and > > maybe a 35/25 bottle from 120 especially if this were a second dive or > multi > > day diving ( this would shorten my high ppo2 exposure, this is not related > > to the weenie bullshit about second dives, only the oxygen damage ). > Ascent > > rate is 30 fpm from the bottom consciously stopping at each ten foot > > increment to be sure to hold the slow rate, and the first deco stop would > be > > at 190, then ten foot increments for 30-40 seconds until you hit the > > standard curve, then lengthen the gas switch stops and eliminate the ten > > foot stop and you should have it about right. Very slow ascent from 20 to > > the surface. The whole deco and ascent would be less than an hour. I > > personally do that one with about 45 minutes total. If you do the lower > part > > correctly , there is nothing to unwind later up higher. If you do not, > like > > most people do not, then there is no amount of time on oxygen that will > stop > > the damage, but will only make it worse. > > > > -----Original Message----- > > From: Bryon Bertrim [mailto:bryon@be*.co*] > > Sent: Wednesday, July 04, 2001 2:59 PM > > To: Trey; techdiver@aquanaut.com > > Subject: Your way > > > > > > George what is your way to a 250 Ft open water dive for 30 Min BT. I know > > Deco planner etc > > > > BB > > > > > > > > > > ----- Original Message ----- > > From: "Trey" <trey@ne*.co*> > > To: "Matthias Voss" <mat.voss@t-*.de*> > > Cc: "Manos Manoli" <cytech@ma*.co*.cy*>; "Tech Diver" > > <techdiver@aquanaut.com> > > Sent: Wednesday, July 04, 2001 8:07 AM > > Subject: RE: 33m Narcosis > > > > > > > > > > It is great stuff - you lose you abilities and you don't care. > > "Adaptation" > > > is like closing one eye when driving drunk. Ask any drunk if he is ok to > > > drive and see if you can find one that ever says "no". > > > > > > -----Original Message----- > > > From: Matthias Voss [mailto:mat.voss@t-*.de*] > > > Sent: Wednesday, July 04, 2001 7:40 AM > > > To: Trey > > > Cc: Manos Manoli; Tech Diver > > > Subject: Re: 33m Narcosis > > > > > > > > > Agreed! > > > So when going down fast, it is the lower order brain functions, like > > > equilibrium, motion control, that get impaired first, this is monitored > > > by the higher functions, which then seem to be impaired as well, > > > ......adaptation. > > > When going down slowly, the higher functions are affected hand in hand, > > > so no monitoring. > > > Though, I have seen amazing inter- and intraindividual adaptations. Not > > > enough to make a system of it ... > > > Matthias > > > > > > Trey schrieb: > > > > > > > > Mathias, you just notice it better when it is fast, as you would > notice > > > the > > > > buzz if you dropped deep on air real fast. If you go slowly, the > higher > > > > order brain functions will tell you you are OK. > > > > > > -- > > > 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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