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>At the risk of being flamed can someone explain the logic of forcing a diver >interested in going onto trimix into doing deep air dives??????? > There is absolutely no good reason for this and largely in response to pressure from members of this list (George Irvine in particular) IANTD developed an intermediate trimix course that takes the place of advanced nitrox as a prerequisite to full mix and eliminates air/nitrox diving beyond recreational depths. GUE obviously doesn't require any deep air but may not have instructors available in your area. Check www.gue.com to confirm. Best - Bill Wolk On12/21/99 3:03 PM, deep-gasdiver@uk*.ne* wrote: >To get onto a trimix course one must first undertake a nitrox course, in >some >instances two or three nitrox courses (basic, advanced and extended range) >which basically in the deeper dives has no benefit other than accelerated >decompression via the use of nitrox or pure 02 during deco. A perfect >example >is a course covered in an article in the latest "Dive" magazine, this >editorial >explains how students on the divers lodge basic (TDI) trimix course >simulate a >trimix dive to 45m dive with air as the back gas ???????????? What logic >is that > >If trimix or Heliox is the way to go why subject students or divers >interested >in improving their diving safety and enjoyment to what is effectively deep >air >diving. If He is safer than N2 then why should a diver not be able to use >say a >21/12 or 21/18 mix ( or other ) to depths up to say 50 - 60 metres without >going through a nitrox course? If they want to use nitrox or pure 02 for >deco >then they should undertake a course to cover the use of higher pp02 as a >deco >gas > >I realise and understand that if a diver wishes to do deep trimix dives >which >involve significant planning and skills then a greater level of experiance >and >maybe an intermediate qualification is required before taking an advanced >trimix course but access to He should be made easier at the 30 - 60m ranges > >Mike > > > > >---------------------------------------------------------- >This message was sent using http://uk2.net >UK's FREE Domains, FREE Dialup, FREE Webdesign, FREE email > > >-- >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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