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I probably should have cc'ed the list from the start. Here is something you all may have interest in. TB --- Todd Baldi <Todd_Baldi@ms*.co*> wrote: > > > -----Original Message----- > From: kirvine@sa*.ne* [mailto:kirvine@sa*.ne*] > Sent: Wednesday, September 15, 1999 9:00 AM > To: Todd Baldi > Subject: Re: Deco Profile > > > Same aswer - helium is better. The habitat allows > breathing oxygen at 30 > feet in a dry space - can't do that in water. > > > > Todd Baldi wrote: > > > > George, > > > > Sorry for my clusterfuck. I sent the wrong > article. The one I had the > > question on is below. > > > > What I dont understand and my question is: Since > helium is much more > > soluable in tissues than nitrogen, why are decoing > with a high helium mix? > > Aren't you ongassing more helium while decoing? > Or does the 20 foot > oxygen > > stop wash this away. How do I calculate a cleanup > stop into my deco > > profile? Wont it screw up most of the deco > programs out there? > > > > For those of us that do primarily open water > diving what does the phrase > > "for no habitat I would shift everything up ten > feet mean"? > > > > Thanks in advance, > > Keep up the flames, (They will eventually listen), > > Keep breaking everyone's records > > > > TB > > > > P.S. Has the WKPP ever thought of mapping Eagle's > Nest > > (If nothing else to make fun of Jim King and the > Deep Breathing Systems > map) > > The workout regimen and diets we are on mean zero > cold, tired, or bent, > with > > minimal decompression. The deco technique is now > producing a fast get out > > without the usual sequence or time. From 295 on > 11% oxygen 60% helium, > > it went like this: 240 for 5 on 19/35, then by > tens, 2, 4, 2, 3, 4, 6, > > 8,10,10,10,10, then from 120 on 35%, > 20,13,13,13,20, then from 70 on 50/50 > > 20, 30, ( all 20 on, 5 off to back gas with out > changing the stops ), then > > 20 at 50 on 19/35 ( cleanup break), and 50 at 50 > on 35%, then 50 at 35 on > > 50%, then 230 at 28 on oxygen with breaks to 19/35 > every twenty for five, > > and then 15 at 28 on 19/35 and straight up to the > surface for a 13.5 hour > > run time, and a little less than 10 hour deco. > This produced the > cleanest > > deco I have felt yet for one of these long dives > by eliminating the severe > > oxygen pounding and the oxygen bends, as well as > the need to decompress > from > > the intermediate stops or the oxygen. The > helium-based deco gases make a > > huge difference, as does the extreme conditioning > , and I will find out in > > the morning what my time is in the five mile ( > swim ) to see if there was > > any loss of vital capacity, and then again Monday > in an 18,000 meter swim. > I > > discovered a few dives ago that by not using the > oxygen towards the end of > > the deco and not decompressing up from 30 feet, > the need for the one foot > > per minute wind down is eliminated, and you can > get straight out, and it > is > > safer since the risk of in water tox is not > anywhere near as high that > much > > later. For no habitat, I would shift everything up > ten feet . Mixing up > the > > high and low ppo2's and gas mixes as well as using > the pure oxygen in > doses > > seems to make a world of difference. > > > > > -----Original Message----- > > > From: kirvine@sa*.ne* > [mailto:kirvine@sa*.ne*] > > > Sent: Tuesday, September 14, 1999 6:13 PM > > > To: Todd Baldi > > > Subject: Re: Deco Profile > > > > > > > > > We break to the lowest oxygen gas that can be > breathed at the depth we > > > are at. This is to avoid toxing and to avoid > lung damage - what are you > > > asking me? trimix or heliox is the easier gas to > deco from, not nitrox > > > or air. > > > > > > Todd Baldi wrote: > > > > > > > > George, > > > > > > > > I read the following article that I took off > the Halcyon website. > > > > > > > > This dive was done on the Halcyon rebreather, > so only took > > > about 105 cubic > > > > feet of bottom gas ( 11/60), plus break and > inflation gas from the > back > > > > tanks ( as well as "reality" check gas"), 40 > cubic feet of > > > 19/35 trimix deep > > > > deco and break gas, 80 cubic feet of 35% > nitrox, 40 cubes of > > > 50/50, and 100 > > > > cubic feet of oxygen. 3:40 bottom time, 9:50 > deco. We stayed on the > > > > rebreather up to 50 feet to stay warm, and the > scrubber never > > > broke through. > > > > I went to releasing every third breath at 50 > to be sure, since > > > I had used a > > > > calculation that said I was packed for 8-11 > hours, but it was not > > > > necessary - I could not tell the difference > between open and > > > closed circuit > > > > . I have four bottles to fill to dive again. > The scooters > > > had 70 minutes > > > > left on the last one, 100 minutes on the main > one, and 110 > > > minutes on the > > > > first one. The light had 45 minutes left after > staying white > > > through five > > > > hours. The new motors develop exactly the > right efficiency and > > > speed with > > > > the rebreathers and safety tanks, and the new > rebreathers give us our > > > > surface breathing rate independent of depth. > > > > > > > > I had a question regarding your decompression > profile. I see > > > that you break > > > > back to trimix at 50 feet (your cleanup break) > and end with a > > > switch back to > > > > trimix to the surface. I don't understand > this and can't find any > info > > > > regarding this. Can you shed some light on > why you are making > > > the switch > > > > back to trimix at depth and also to finish > your dive? Is there any > > > > literature that I can read that describes this > or did you come > > > up with this > > > > techinique yourself. > > > > > > > > Thanks in advance, > > > > > > > > TB > > > > > > > > > > > > > __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.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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