Question calculating NDL is difficult

[int]

I want to make a diving decompression algorithm. I read a couples of papers but 'winke's yet. so I understand about what is m-value, how to apply gradient factor, how to calculate a tissue compression, what is NDL and how can calculate it, what is water vapor, and difference of compression about descending or in a bottom time.
I already made an algorithm based on bakers paper.
But a change rate of 'ndl' about depth is too big. I have no idea why it is at all.

I referenced mainly diy-zhl/diyzhl.ipynb at master · dmaziuk/diy-zhl when made a program:
calculating tissue compression

calculating NDL

I attached result of my algorithm.
Please give me a opinion about results.


If this is solved, I want to make an Apple Watch app to use my ultra for diving.

 

[John C. Ratliff]

I am curious, why not just use the NDL dive tables, like we have for the last 50 years?

SeaRat

 

[Ukmc]

I am curious, why not just use the NDL dive tables, like we have for the last 50 years?

SeaRat

People have rode horse carriages for hundreds of years and still can now, but I don’t see them much on streets anymore…
yes, there is nothing wrong with the tables, however, OP wants NDL to show up on his Apple watch.

 

[int]

People have rode horse carriages for hundreds of years and still can now, but I don’t see them much on streets anymore…
yes, there is nothing wrong with the tables, however, OP wants NDL to show up on his Apple watch.

Yeah, that's right. Additionally, I'm not good at diving, so I want to see a more definite value because there are frequent ups and downs and less water maintenance.

 

[Etmutt]

You migth have some luck looking at shearwater papers. They make their implementation underlying principles somewhat public, even tough i could not immediately find it rigth now

 

[int]

You migth have some luck looking at shearwater papers. They make their implementation underlying principles somewhat public, even tough i could not immediately find it rigth now

i read and used these mainly:
DIY DECOMPRESSION
By Stuart Morrison
Some Introductory “Lessons” About Dissolved Gas Decompression Modeling
Presented by Erik C. Baker, P.E.
Understanding M-values
By Erik C. Baker, P.E.

I hope it is helpful.

 

[int]

You migth have some luck looking at shearwater papers. They make their implementation underlying principles somewhat public, even tough i could not immediately find it rigth now

Oh I got some mistakes. That shearwaters data is from my shearwater computer.
The log obtained by diving directly was extracted using the program provided by shearwater.

 

[Etmutt]

ah also, did you try looking at subsurface implementation ? they have a planner able to use both Buhlman and VPM

 

[int]

ah also, did you try looking at subsurface implementation ? they have a planner able to use both Buhlman and VPM

Oh why didn't I see this
Thanks a lot.
I'll check this.

 

[int]

ah also, did you try looking at subsurface implementation ? they have a planner able to use both Buhlman and VPM

fortunely, the values are very similar to mine. Unfortunately, there is also a difference from shear water. Thank you for letting me know though.