rjack321:Most of the cheaper air only computers are still haldane based though. Whether this is the majority of available models, I dunno.
Actually that is not true. Some of the largest manufactures still use Haladine tissue compartments.
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rjack321:Most of the cheaper air only computers are still haldane based though. Whether this is the majority of available models, I dunno.
Rec Diver:For me a 200' foot dive would require a 27 total minute obligation for decompressing on air. If I were to use 100% oxygen to finish my decompression instead of air I could reduce my total deco time to 16 minutes.
However, your computer shows an interesting situation were doing the, RGBM, deep stops actually adds time to your decompression obligation. It is not just your computer that does this, but so do the others I have witnessed, including my own. I find it interesting that the RGBM deep stop method regarded as being "new science" for deep diving will increase your deco time for a computer diving model. Maybe doing multiple, or extened time, deep stops should be questioned? Though I perform a deep stop it seems that extending the time greater than a minute also increases the decompression time. If you are not diving a computer that is compounding your deco obligation and you are using tables with out the ability to compund tissue compartments, could this lead to a hit.
rjack321:Most of the cheaper air only computers are still haldane based though. Whether this is the majority of available models, I dunno.
Rec Diver:I have downloaded the recent, 2004, Navy air tables. They are exactly the same as the 1984 air tables. What they have changed is the use of helium, and accelerated decompression. However, there is a different set of tables for that.
lamont:Oh yeah...
Suunto Vypers and such have been using RGBM-modified haldanian models for a long time. Recently the D9 has come out which has deep stops added to it, so it can no longer be considered haldanian or equivalent to the navy tables at all. The v-planner, decoplanner and GAP software packages all have bubble models. Mares and Dacor now have computers with deep stops. The VR3 dive computer uses a bubble model.
The bubble models are computation much harder than haldanian models, which is why you see so many bubble-modified haldanian implementations like the Suuntos, but the trend is clearly towards to the bubble models -- and the higher end trimix tech diving computers are all embrancing the full bubble models.
Although I'm certain this is all just a plot by GI3 to brainwash the entire diving industry, and they're all just going along...
lamont:The US Navy works at the speed of government on things like this...
So you want to question the validilty of deep stops (newer bubble models) because your computer (older Haldane model) still thinks you are on gassing? That is exactly why some people argue that Haldane models are outdated and why most people doing serious deco are using their computer in gauge mode (and following Vplanner tables or similar) or using a computer like the VR3.Rec Diver:However, your computer shows an interesting situation were doing the, RGBM, deep stops actually adds time to your decompression obligation. It is not just your computer that does this, but so do the others I have witnessed, including my own. I find it interesting that the RGBM deep stop method regarded as being "new science" for deep diving will increase your deco time for a computer diving model. Maybe doing multiple, or extened time, deep stops should be questioned? Though I perform a deep stop it seems that extending the time greater than a minute also increases the decompression time. If you are not diving a computer that is compounding your deco obligation and you are using tables with out the ability to compund tissue compartments, could this lead to a hit.
rjack321:210 on air? Don't know how to plan you O2 deco time? Shuddder
Rec Diver:For me a 200' foot dive would require a 27 total minute obligation for decompressing on air. If I were to use 100% oxygen to finish my decompression instead of air I could reduce my total deco time to 16 minutes.
OWSI176288:I got to get me one of those computers that will talk me into getting to 20 feet as fast as I can and get me out of the water much quicker