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Can someone forward this to Diver's City? I seem to have deleted them from my address book. George Irvine wrote: > Pete, you don't need "experience" to dive helium - you need common sense. > The only mystery with helium is to the dive instructors who are too stupid > to understand it. The funny part is that there is nothing to understand. If > you go to the hospital and have surgery or have any respiratory issues , > they put you on heliox. Do you think they check for a "C" card first? Helium > is an obviously superior choice as a breathing gas. Sometime in the first or > second grade, we learn how much oxygen and nitrogen is in the atmosphere, > and what it takes to keep us alive. Unfortunately, most dive instructors > don't make it that far. > > PADI OW 1 teaches what partial pressure is. Air is the hardest gas , if not > impossible, to decompress from. Helium based mixtures, especially heliox, > are the most friendly gases for diving in every respect. > > -----Original Message----- > From: petesfscuba@me*.co*.za* [mailto:petesfscuba@me*.co*.za*] > Sent: Friday, April 26, 2002 4:05 AM > To: techdiver@aquanaut.com > Cc: "nztechdivers@yahoogroups??????????????????? > Subject: RE: Was Single or Doubles, now amount of dives > > The dogmatic insistance on a big dive log to start using helium seems to be > based on the assumption that anyone using helium wants to dive deeper than > 40m > (or 60m if they punt deep air). I got really frustrated with this because I > wanted to use helium in the 30-40m range (100-133ft). Because there is no > training agency here that trains Normoxic Trimix below 75 dives (CMAS-ISA) > (IANTD=100), and I couldn't get He fills anywhere in South Africa until I > could > wave the C-card around, I have had to stay above 30m to build up the dives. > > Sadly, this is counter productive, because we have such a dominant deep-air > contingent here in SA. If helium were introduced much earlier and based on > objective skill criteria (e.g. when bouyancy is sufficiently mastered), and > not > number-of-dives, it would stand a better chance of getting away from the > voodoo > gas stigma, and be more competently used. > > IANTD and other "tech" training agencies probably find number-of-dives an > easy > measure of experience, which would apply to any diving beyond the dead > simple > and lowest risk "recreational". The question then becomes: "why deny > recreational Helium?". ...because it is still seen as voodoo gas and > "everyone" > is scared of it for shallow diving... > > Maybe this view will shift over time, as the use of He in shallow dives > gains > more public exposure as DIR grows. Efforts by you(Trey)and the WKPP guys, > and > GUE to get people to understand the benefits of DIR have gone a long way to > making these changes. The DIR-UK guys and the DIR New Zealand group have > been > doing great work at getting DIR seen by the wider diving community, through > practical demonstrations, exhibitions & club visits. If we keep up the > effort, > practical DIR wisdom will soon become evident to everyone. > > Pete. > > -----Original Message----- > From: George Irvine [mailto:girvine@be*.ne*] > Sent: Friday, April 26, 2002 3:03 AM > To: Dogtrner1@ao*.co*; techdiver@aquanaut.com > Subject: RE: Was Single or Doubles, now amount of dives > > Karla, any trimix requires no dives. What kind of drooling moron would tell > somebody they need to do 200 air dives before they could dive the correct > gas? > > ------------------------------------------------------- > This message was sent using MetroWEB's WebMail service. > http://www.metroweb.co.za/ - full access at only R49.95 > > --------------------------------------------------------------------- > To unsubscribe, e-mail: quest-unsubscribe@gu*.co* > For additional commands, e-mail: quest-help@gu*.co* > > -- > 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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