jjones9527
Contributor
That article helped me tons to understand how the curve worked, and how the GF's affected the profile and deco.
Gradient Factors Question
- Thread starter lamont
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rainman_02
Contributor
Gradient Factors were great for massaging the Buhlmann "bend and mend" deco curves. VPM-B and RGBM curves tend to be a better deco guess in my opinion. And if you feel the need to have some sort of Buhlmann shape, there's always VPM-B/E (Ross's proprietary algorithm that combines bubble-based deep stops and Buhlmann based shallow stops). Some people think it is the best of both worlds.
When it comes down to it though, I use ratio deco for its repeatability, flexibility, and ease of use.
When it comes down to it though, I use ratio deco for its repeatability, flexibility, and ease of use.
It's actually a very good question, Lamont, even if it did take me 24 hours to figure out what you were looking at.
I think it speaks to the artificiality of using GFs to manipulate the pure Buhlmann output. GFs are no more valid than Ratio deco -- They're just another method of doing curve fitting.
I think it speaks to the artificiality of using GFs to manipulate the pure Buhlmann output. GFs are no more valid than Ratio deco -- They're just another method of doing curve fitting.
FLDVR
Contributor
This has been a very educational post, thanks for starting it!
I read the article on Rebreather World explaining the GF factors and manipulation and Yes, now I have a basic understanding of using the GF to change the loading amounts of the compartments: However : It seems that this tweaking of the GF factors just contributes to "Numbers Narcosis" while playing with Decoplanner.
Sometimes I think a dedicated class for this subject would be quite beneficial
Henry
I read the article on Rebreather World explaining the GF factors and manipulation and Yes, now I have a basic understanding of using the GF to change the loading amounts of the compartments: However : It seems that this tweaking of the GF factors just contributes to "Numbers Narcosis" while playing with Decoplanner.
Sometimes I think a dedicated class for this subject would be quite beneficial
Henry
limeyx
Guest
This has been a very educational post, thanks for starting it!
Sometimes I think a dedicated class for this subject would be quite beneficial
Henry
There (kind of) is. Andrew Georgitsis from 5thd-x will teach a Ratio Deco class that does cover gradient factors, and he would probably devote more time to them if asked nicely ...
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SCUBA_Phil
Contributor
Just to add to the education process, here is one of the best discriptions of VPM that I have run across:
VPM For Dummies - Rebreather World
Phil
VPM For Dummies - Rebreather World
Phil
limeyx
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Right, and that you have been bold-faced lied to right from the beginning
Lol yeah something like that. The "comparisons" I was shown between deco planner and his preferred alternative were surprisingly crude for someone so mathematically inclined as Andrew. But as he put it "why compare to a bogus model?", what works works. I think you and Maciek are actually living proof as your 2nd dive should have bent you alone, nevermind the flight 5 hrs later bending you like pretzels. At least according to m-values.
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