Mailing List Archive Mailing List Archive
> I know for a fact that 120 is more narcosis than I want, than I want > anyone around me to have, or than I will allow around me. It is for > idiots and strokes, and we have no lack of those, now do we Dave? I don't mind holier-than-thou stuff so much when it seems to be consistent. But this is the first time I've heard of 120 being "deep air". Shit, now I'm a stroke for diving 120' on air. Ok how do I un-stroke... let's look at the alternatives... Guess I should take a mix class. Ok. Where do I stand. I have my nitrox card and a thorough understanding of Haldanean gas theory behind the tables. Wrote code to replicate the tables down even to the pressure groups. Added in code to handle the helium in the mix, but never have played with it much, set it to zero, haven't dug out the constants either to plug in. Can;t say I can claim a good understanding of how helium affects everything, then again I think I could gain that (at least at the table theory level) in 2-3 hours of reading and crunching some numbers. I'm fine with doubles, and a stage and a deco bottle. Ok for shallow (say 150') mix, that should seem to be plenty. for 150' it shouldn't seem to require a hypoxic mix, so maybe a deco bottle would be that I need. Let's go agency shopping. Let see IANTD everyone's favorite.... Let's see, basic nitrox now... I gotta take hmm, its not clear, but I know for the full-blown course mix you had to have several levels of nitrox, deep air before trimix. They now have "Intermediate Trimix" which seems to fit the bill... They list 130' as the beginning of the zone for the mix, but I guess they won't stop you from using it more shallow.... Andi.com brings up something else, and don't feel like sarching for it... on to GUE. Ok start with Advanced nitrox... not sure if my IANTD basic covers me for that.... do note that GUE lists that their advanced nitrox diver 1 course goes below 120' to 130' . We've had the discussions before about nitrox not being less narcotic than air. This looks like "deep air". well maybe place out of that course, on to the next one... looking at the Technical Diver 2 course, it states that its purpose is to train divers in the 130-200' range. Of 8 dives, 2 will use Helium. That's 6 dives that while are not "deep air", they look like "deep narcosis". Also I'm not clear that I can get mix fills after this class? since the NEXT class is entitled Mixed Gas, I'm going to assume not. Be glad to find out I am wrong. So with GUE as well, I have 2 more course to take. Maybe 3 if I don't place out of the Advanced nitrox one (advanced implies there was some "basic" as a pre-req to me). Actually its not that I want to dig at these course guidelines, its that people have been yelling about "deep air" for years now, but at the same time, even with GUE, when you say ok give me an alternative, let me learn trimix for shallow depths... you get nothing. Let me take a class to learn mix for 100-150' depths. Shouldn't need anything hypoxic at those depths. Should need what, maybe one deco mix? Why should a diver need anything but basic nitrox before taking such a course. Make the math and theory rigorous, but offer the course. Flunk those that cannot prove they understand the theory. so where are the alternatives? Why can't we remove all these hoops before someone will certify you for shallow mix? Make it accessible, people will use it. Put multiple expensive certifications in the way, and people will not. Not because they don't want to, but becuase shallow mix isn't worth $2000 in course fees and 2 weeks of my vacation time. It ain't that friggin complicated. Ho hum, sure this will turn into a fun set of replies. Mike -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]