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Hi David, > I do not understand the position you have on the Nitrox and > not being safety > for recreational dives but it is fine as a deco gas???? I think Jim has summed it up pretty well so far=2E Higher ppO2's are easier= =20 to handle when the diver is resting and able to make frequent low ppO2 =20 breaks=2E This is possible at deco but not on the bottom=2E There still seems to be a great fear that a dive requiring a deco stop is =20= =20 somehow less safe than one which is within no-deco limits=2E If you want =20 less deco then sort it out on the ascent and stops, not with big O2 =20 exposures=2E If you are not willing to pay that penalty then you shouldn't=20= =20 be doing dives where deco stops are necessary or a reality=2E > > It is okay to jack up the PO2 with Trimix but not with N2 only??? I'm probably not the only one who has noticed mix is a hell of a lot =20 easier to breathe in air/nitrox depths=2E Wouldn't surprise me if that =20 related to how much O2 exposure the lungs will handle=2E Anyhow, the ppO2 =20= =20 is only increased within the deco phase on a mix dive, with breaks, not =20 when the diver faces exertion and added work on the lungs=2E Cheers, S > > Please explain=2E > > David > > -----Original Message----- > From: Jim Cobb [mailto:cobber@ci*=2Ecom] > Sent: Tuesday, October 10, 2000 2:04 PM > To: stuart=2Emorrison@sw*=2Eco=2Euk; dmdalton@qu*=2Enet > Cc: dwiden@ho*=2Ecom; donburke56@ne*=2Enet; Bakalite@ba*=2Ecom; > techdiver@aquanaut=2Ecom > Subject: Re: rec trimix > > > I tend to put divers into 2 groups=2E One I call the "80 & > bolt" crowd, this > is where you take an aluminum 80, fill it with air, slap it > onto your back, > jump in the water and when you run out of air bolt to the > surface=2E Hundreds > of dive operations around the world use this technique as it > is idiot proof > and almost impossible to get bent=2E > > Beyond that is technical diving=2E This is where a diver gets > to the point > that you can't simply head to the surface when if you run out > of air or have > other problems=2E When you do this you need to have special equipment, > procedures and experience=2E It is very expensive=2E > > Nitrox diving is a sort of quasi-tech diving where folks are > trying to do > what tech divers do without paying the piper=2E But what people > don't realize > that the decision to use high PP02's is exacting a price=2E The > price is that > you are increasing the likelihood of your getting killed or > damaging your > lungs for the sake a few minutes of bottom time=2E > > And what is the point of that? About the only thing I can say > good about > nitrox training is that it teaches you the fundamentals of > mixing gas=2E Other > than that you might as well do trimix at the same time and at least do > something to make your dive safer, not less safe=2E > > Jim > ------------------------------------------------------------------- > Learn About Trimix at http://www=2Ecisatlantic=2Ecom/trimix/ > > > From: stuart=2Emorrison@sw*=2Eco=2Euk > > Date: Tue, 10 Oct 2000 15:10:39 +0000 > > To: cobber@ci*=2Ecom, dmdalton@qu*=2Enet > > Cc: dwiden@ho*=2Ecom, donburke56@ne*=2Enet, Bakalite@ba*=2Eco= m, > > techdiver@aquanaut=2Ecom > > Subject: RE: rec trimix > > > > Jim, > > > >> if you need to spend more time down > >> there then you need > >> to do it right with doubles and a deco plan > > > > at last someone talking sense, trimix on single bottles, > recreational > > trimix certs, no-deco gas diving tables=2E=2E=2E what next - fat > tourists in > > lycra skins trying to work out gas dives on the wheel, > wearing Zeagle > > BCD's and black snorkles and trying to find somewhere to stuff their > > Spare Air? We are talking about a community that cannot > change a finstrap > > without taking a training course first=2E It's a noble aim to > "save" rec > > divers from narcosis, but this is not the answer, it's a > quick fix, it is > > not a solution=2E If you dive gas then dive it properly, this > is beyond the > > realm of recreational diving=2E > > > > > > > > Visit our web site at www=2Escott-wilson=2Ecom > > > > Privilege and Confidentiality Notice=2E > > This e-mail and any attachments to it are intended only for > the party > > to whom they are addressed=2E They may contain privileged and/or > > confidential information=2E If you have received this transmission in > > error, please notify the sender immediately and delete any digital > > copies and destroy any paper copies=2E > > Thank you=2E > > > > > > Scott Wilson Scotland Ltd > > Registered in Scotland No=2E 48951, > > Registered Office: 6 Park Circus, Glasgow, G3 6AX=2E UK=2E > > > > > > > ______________________________________________________________ > __________ > > This message has been checked for all known viruses, by > Star Internet, > > delivered through the MessageLabs Virus Control Centre=2E > > For further information visit: > > http://www=2Estar=2Enet=2Euk/stats=2Easp > > > > > > -- > Send mail for the `techdiver' mailing list to > `techdiver@aquanaut=2Ecom'=2E > Send subscribe/unsubscribe requests to > `techdiver-request@aquanaut=2Ecom'=2E > > ______________________________________________________________ > __________ > This message has been checked for all known viruses, by Star > Internet, > delivered through the MessageLabs Virus Control Centre=2E > For further information visit: > http://www=2Estar=2Enet=2Euk/stats=2Easp > > > =20 Visit our web site at www=2Escott-wilson=2Ecom Privilege and Confidentiality Notice=2E This e-mail and any attachments to it are intended only for the party=20 to whom they are addressed=2E They may contain privileged and/or=20 confidential information=2E If you have received this transmission in=20 error, please notify the sender immediately and delete any digital=20 copies and destroy any paper copies=2E Thank you=2E Scott Wilson Scotland Ltd Registered in Scotland No=2E 48951,=20 Registered Office: 6 Park Circus, Glasgow, G3 6AX=2E UK=2E ________________________________________________________________________ This message has been checked for all known viruses, by Star Internet, delivered through the MessageLabs Virus Control Centre. For further information visit: http://www.star.net.uk/stats.asp -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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