Samir
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Who out there using RGBM tabels for trimix dives? Has anyone had problems??
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Samir once bubbled...
Who out there using RGBM tabels for trimix dives? Has anyone had problems??
O-ring once bubbled...
...although it is not the default and you cannot use it for nitrox dives (only trimix).
Abyss has an RGBM algorithm......although it is not the default and you cannot use it for nitrox dives (only trimix).
You selected RGBM (Reduced Bubble Gradient Model) as your deco algorithm.
The RGBM algorithm in Abyss has specific limitations that MUST be observed to create a correct RGBM deco profile.
#1. SQUARE PROFILES ONLY!
No Multi-Level dives.
#2. NO REPETITIVE DIVES!
Single Exposure dives only.
#3. TRIMIX or HELIOX MUST BE THE BOTTOM GAS!.
Do not use AIR or NITROX as a bottom gas.
#4. YOU MUST SELECT ONE OF THE RGBM VALUE SETS!.
Defaults-Algo Controls-RGBM, "Shallow, Normal, Deep, Extreme".
#5. USE SLOW ASCENTS !
RGBM strongly favors a SLOW ascent rate. Limit your rate of ascent to 33ft-10m/min or LESS.
#6 FINAL SURFACE STOP
Don't forget your final deco stop at the surface. Avoid any activity upon surfacing.
#7. SURFACE DECO GAS.
Remain on your deco gas for a while after surfacing.
#8. BE MORE CAREFULL!
RGBM generates a VERY accelerated deco profile compared to nor!
mal Abyss algos. Use extra Care and Caution when using it.
O-ring once bubbled...
Maybe we misunderstood each other...I am talking about Abyss decompression software and not the Suunto computer line. I do not own a Vytec, although I do have a Vyper. The RGBM implementation in these is ultra-conservative. Is the conservatism the reason you are leaning away from the Vytec?
No, RGBM is a model/algorithm that has applications in the recreational space for air and nitrox mixes as well. The newly released NAUI tables are RGBM tables and there are extended range/deco tables coming out soon using RGBM. IMHO, and I am not sure, the reason for RGBM's restrictions in the Abyss implementation is grounded in the Abyss software itself. I don't see any logical reason for RGBM to not do all that we have talked about (nitrox, air, shallow deco, etc.), so I am left with the notion that it must be some limiting factor in Abyss' implementation of RGBM.No, I knew you were discussing software, but I was curious as to, if RGBM only applied to trimix, why/how it was implemented in a nitrox/air computer. My fault for being less than concise.
Agreed. My buddy has the Vytec and I have a Vyper. My Vyper keeps me in the water about twice as long (obviously depending on profile and bottom time) as Decoplanner...I do not know a good way around this other than stop using it as anything other than a gauge (even with Nitrox) and switch to tables/software unless another computer does it better (maybe the VR3).I wanted something that could do reasonable deco dives using nitrox and doubles, and have gauge mode to use for trimix. The Vytec appeared to fill that requirement, but not if I have to spend an additional 20 minutes doing deco for a fairly simple dive.
I think the Suunto implementation is dumbed down significantly and made so ultra-conservative that the warning is inherent in its use. The Abyss model might be less conservative, but I wouldn't know since I can't really use it. I ran some sample profiles on it, but since it won't go over 100' in depth I can't get much out of it. Since I am not diving trimix, I found the demo pretty useless and knocked it out of my list of programs to use for my personal diving and decided on decoplanner until something else comes out.I also find it very confusing that Abyss has all those dire warnings concerning a very agressive profile using RGBM, while the Suuntos are directly opposite.