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Case, I have not taken any formal "blending" training at all. But I sure as hell did the research into the physics and physiology behind PP of O2, N and He before I even remotely considered diving the stuff. And not only that, I would never stick a regulator into my mouth which was attached to anything which I had not personally tested and in most cases personally mixed. And I won't mix gas for anybody but myself, this is all common sense. I have approached this whole nitrox/trimix thing with the presumption that it is my ass on the line which means that every source of information that I researched was not valid until it double or triple checked against other sources. That and common sense allowed me to conclude, among other things: -The 02 clean thing is completely overblown (er, no pun intended). -You don't have to roll your tanks to mix your gas. -"Its the PP02, stupid", the He percentage is not critical. -Mixing will drive anal people crazy, there are simply too many variables. These conclusions should be reached by any reasonable person who wishes to do technical diving long before he or she mixes or breaths the first batch of nitrox or trimix. I think that tech diving is a sport you have to be really into for the sake of survival. You let other people do your thinking for you and you will wind up on The List. In this particular question, whether an inert gas could compromise the ability of a hose to transport 100% O2, it implies that while the "O2 clean" hose is not being used to move 02 it should be kept in a vacuum so all the other nasty gasses in the air we are currently breathing won't contaminate the stupid hose. I mean really, people, the only way a rational person could come up with a question like this would be because he was so terrorized by his instrokter's misinformation to the point that "O2 clean" is some sort of voodoo which can be achieved only when the chief IANTD witch doctor mumbles the proper incantations (after a sufficient offering has been made, gold Kugerands accepted) and the accolade is indoctrinated into the cult. What BS. On the check off list, yes I got them and they are very nice, thanks. If you don't mind I can put them on the Trimix site for others to download. Jim ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/ > From: "Case E. Harris" <diveman@gc*.ne*> > Reply-To: "Case E. Harris" <diveman@cy*.co*> > Date: Mon, 24 Apr 2000 16:35:57 -0800 > To: <ajmarve@ba*.ne*>, "Jim Cobb" <cobber@ci*.co*> > Cc: "Bryon Bertrim" <bryon_bertrim@ho*.co*>, <techdiver@aquanaut.com> > Subject: Re: Q about 02 fill whip experience > > Hmm... guess some clarification is in order here. (Sorry for the lack of > clarity... message was composed rather late at night after a bad online > gaming experience!) > > Al Marvelli wrote: >> Can you expound on your statements below? If you have a gas mix, and you > know >> what you start with, what you add, what you need and what you end with, > what >> else is there? > > That's the math part of it all that you can get from a book. Most EAN > Blender classes don't do much in the area of actual filling (what happens > when part of the fill is done too fast, what happens if you're a 50 psi off > in one area or another, etc...) and almost nothing in regards to fill system > design. > >> Also, are you advocating deep air training here or simply implying most > nitrox >> mixers are idiots??? I don't mean to flame but I am just trying to > understand >> your comments. > > Certainly not. What I meant was that if someone has taken only the Adv. EAN > class and the Blender class, they missed a HUGE amount of info by not "being > sold" a book that I found quite valuable.... Mix is certainly the way to go, > the Tech EAN book just has some good blending info in it. > > Also, Jim Cobb wrote: >> Case, would you let someone get out of your class certified trimix or >> blender with Bryon's level of knowledge? I'm not knocking you, it's just >> that with questions like this you have to wonder what is being "taught" > out >> there. > > ABSOLUTELY NOT! The sad thing is, your questions about what is being taught > out there are very well founded, and our fears about what people are > teaching are very real ones. Someone who's mixing gas is often called upon > to maintain fill systems, O2 service gear, etc... and most of this (along > with much actual "turning of knobs") is left out of any blending or Adv. EAN > class I've ever seen taught. > > I've also received some questions about wether or not I'd let Cobb, GI, or > some others (presumably without mix or blender certs) mix my gas. Honestly, > yeah.... but I'd sure supervise at least the first few times until I was > sure they knew what they were doing. Personal knowledge of someone is a > whole different conversation than strangers flashing c-cards in a dive shop. > I was speaking from my experience which has to do with working in a busy > shop environment. > > Does this clear things up a bit? See what happens when I have to write > clearly and coherently? Things just get so darn long winded! *GRIN* > > -Case > diveman@cy*.co* > > ps: Jim, did you get the checklist and gas worksheet okay? > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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