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Started: 1/15/2009 1:33 PM | |
|  | Dive Computers and Tables George Barron has a presentation on this, but thought this might be an interesting topic. Do you understand what tables your computer is using? (US Navy, Haldanian, etc) How they were created? (dive til' you're bent vs. doppler microbubble detedcted) and more importantly, how that may affect the way you use your computer? (push the limits, or add conservatism). I think many folks will be suprised at how much they all vary and what that means for all the dissolved gasses in your tissues!
What do you think? | |
Posted: 5/19/2009 7:09 PM | |
| | OK Todd, I'll bite. I'm not afraid of showing my ignorance, but I am interested in the subject. I do remember reading my Nitek Duo user's manual once upon a time and I think it included some documentation about the tables/algorithms it uses. I have always dove with a SF of 1 preset and when I first used it in Cozumel it was more conservative than the dive master's so I left it at that. I also make sure I never get below 3 minutes of NDL dive time at any given depth, and am usually well above that. Having said that, I would sure like to learn more about the algorithms and what they mean for the kind of diving I do.
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Posted: 6/19/2009 12:22 PM | |
| | Ahhh, so they don't teach the tissue loading compartments & the associated physiology behind the magical no-decompression limits? or did you forget that suff, as it is true, all you really need is a trusty dive computer to do all that. There's some cool learnings behind the theory & how you might be better informed to make decisions on what is going on in your body & why the computer acts the way it does... Go ahead & ask. "Make my day"...
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Edited: 6/23/2009 5:58 PM | |
| | Looks like its you and me in this discussion. You are right, I did forget what I was taught (which was probably minimal) regarding uptake and release rates for N2 in different tissues and how exertion, dehydration, scar tissue, and other factors may affect those rates. What I have not ventured to learn is how the specific algorithm (modified Buhlmann ZH-L16 algorithm) used by my NiTek Duo may affect my own physiology/physiognomy and diving style. Any pointers you might have to help me get educated on this topic would be greatly appreciated. | |
Posted: 8/3/2009 10:10 AM | |
| | Cool. The Buhlmann model is one of the older and more diver tested algorithims. It tracks 16 different tissues. Back in the day of limited processing either 8 or 12 compartments were used (16 is better). As it is modified, it also has additional conservatism added for things like repettitive dives and short surface intervals (I think rapid ascents too). Not sure if it is capable of doing reverse profile dives (shallow to deep), but that is still very controversial anyhow. Bottom line is that your computer is using a very time tested safe (conservative) recreational diving model. Enjoy!
Looks like its you and me in this discussion. You are right, I did forget what I was taught (which was probably minimal) regarding uptake and release rates for N2 in different tissues and how exertion, dehydration, scar tissue, and other factors may affect those rates. What I have not ventured to learn is how the specific algorithm (modified Buhlmann ZH-L16 algorithm) used by my NiTek Duo may affect my own physiology/physiognomy and diving style. Any pointers you might have to help me get educated on this topic would be greatly appreciated. | |
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