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I did not pick the gas, and it actually makes no difference despite what the theory says, but I woudl use the 1.2 ppo2 and as shallow a nitrogen depth as possible, less than 100 feet equivalent. With the aluminum 30 anmd 40 tanks I fill oxygen to whatever the banks have, usually 2000, and the other gases to 3000. Keep in mind that when you do your dives with an 80 deco bottle, you really never use much of it at all. A 40 is plenty . We generally use our 80 deco bottles twice in cave diving, and in the ocean the benfit of the much more manageable 40's and 30's is an overhwelming advantage. You know what I can not understand on this list is in evidence here. I got my 40 Sherwood aluminum tanks from dive shops on Long Island in the 80's, yet none of those guys up there seem to know they exist even now, yet they all are big time "pony bottle" users. Those ponies were all 30s and 40s, and the wreck divers were the ones that I got the idea from originally. All of those guys must have quit diving and taken these secrets with them. Scott and/or Julie Gudmundsen wrote: > > George, > > I've been following these posts and have found them interesting. I have two > questions: > > 1. In this "for instance" dive, what was your recommended back-gas? (I must > have missed it.) > > and, > > 2. When I see you recommending carrying 30 or 40 cu. ft. stage or deco > bottles, how high are you pumping them? (I seem to recall that you mentioned > that you filled them yourself with your own cascade system and only fill > them to 1500 or 2000 psi usually. Do I remember right?) > > Thanks! > > Scott Gudmundsen > Vernal, Utah > ____________________________________________ > ----- Original Message ----- > From: <kirvine@sa*.ne*> > To: Gliviak, Jozef <Jozef.Gliviak@co*.co*> > Cc: <techdiver@aquanaut.com> > Sent: Friday, December 17, 1999 9:43 AM > Subject: Re: DECOMPRESSION DONE BETTER > > > I'd use a 40 of 50% and a 30 of O2. Total deco for this dive is about 45 > > minutes to an hour. The descent shoud be in the 50 fpm range, but may > > have to be faster to "hit" the target. If you have the choice, go slow. > > I'd start the bottom time at depth, stop it as soon as I began > > ascending,and ascend at 30 fpm, actually stopping intentionally every > > ten feet to be sure to keep that ascent slow enough. > > > > The first real stop would be at about 120 feet. although you have really > > done "stops" from 180 using the 30 fpm pattern. The 120-80 are one > > minute stops, then the 70 is 3 minutes, the 60 is 3, 50 is 5, 40 is 8, > > 30 is 13, 20 is 20, and go from 20 to 10 in 10. You can shorten this to > > 45 minutes by dropping it off of the ten and 20, but this is a matter of > > "personal preference". I do it in the 45 , but have zip for > > preconditions. > > > > 15 more minutes in the water is not that bad for most situations. In > > cold water, you may be better off getting out, or jsut shortening the > > bottom time . > > > > I have done it in less than 20, but that was extenuating circumstances, > > and I did not like the effect much. > > > > Gliviak, Jozef wrote: > > > > > > Hello George, > > > > > > OK. Let's do a wreck dive in 70m (228ft) with bottom time of 20min. > Water > > > temp 10C (50F) I'd like to know your gas/tank selection and your deco > and > > > ascent/descent settings. > > > This should be pretty typical for most of us. > > > > > > Thanx in advance. > > > > > > Jozef Gliviak > > > Slovakia > > > > > > P.S: Anyway, I'm very curious about your weird dives :-)) > > > > > > -----Original Message----- > > > From: kirvine@sa*.ne* [mailto:kirvine@sa*.ne*] > > > Sent: Friday, December 17, 1999 3:15 PM > > > To: Gliviak, Jozef > > > Cc: techdiver@aquanaut.com > > > Subject: DECOMPRESSION DONE BETTER > > > > > > Josef, let's use one of yoru typical dives and discuss the best way to > > > deco from that. Mine are too weird and the rules change with long > > > exposures. Start wtih something that is generic for most of the people > > > on this list. > > > > > > Gliviak, Jozef wrote: > > > > > > > > Hello George, > > > > > > > > I was trying to find these schedules but they are not there. Any > > > > news when we will be able to go through your deco schedule ? > > > > > > > > Or can you give us few examples of your typical dive and deco profiles > ? > > > > > > > > Best regards > > > > > > > > Jozef Gliviak > > > > Slovakia > > > > > > > > >From: kirvine@sa*.ne* > > > > >doing anyway, and if they were, I publish the exact schedules in my > dive > > > > >reports on the web site anyway. For everyone else's dive reports, > they > > > > <are on the WKPP section of the GUE site as of today, and the pictures > > > > -- > > 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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