What Deco Algorithm do you use? (Poll)

[midway]

Which NEDU study, please?

It's the tech report entitled "Redistribution ..." that you mention a few posts down. The slides by Simon show pics of slow/fast tissue state/saturation aimed at advancing an explanation for the NEDU results. I have yet to look up the more recent results. It's important to note that the NEDU results are for depths in the 170 fsw range. As floridabob noted, dives in the 200+ ft range are another matter. I doubt there will be meaningful empirical results for such depths but there may be ways around it building on the NEDU results. For cave divers w/o trimix/AN/DP training (there appear to be some) I would encourage to read the NEDU study. It's a well-designed, sound scientifically meaningful study.

[Jax]

It's the tech report entitled "Redistribution ..." that you mention a few posts down. The slides by Simon show pics of slow/fast tissue state/saturation aimed at advancing an explanation for the NEDU results. I have yet to look up the more recent results. It's important to note that the NEDU results are for depths in the 170 fsw range. As floridabob noted, dives in the 200+ ft range are another matter. I doubt there will be meaningful empirical results for such depths but there may be ways around it building on the NEDU results. For cave divers w/o trimix/AN/DP training (there appear to be some) I would encourage to read the NEDU study. It's a well-designed, sound scientifically meaningful study.

I read it -- I don't know how or what kind of bubble model they were using, but that deco plan sucked spectacularly!

Could someone please explain how those 70fsw - 40fsw were "stops" and not just multilevel diving? Of COURSE they were on-gassing all that time!

[Nitrogenius]

I read it -- I don't know how or what kind of bubble model they were using,

BVM(3) a Navi Model the shallow deco was performed after VVal-18 also Navi Model

Could someone please explain how those 70fsw - 40fsw were "stops" and not just multilevel diving? Of COURSE they were on-gassing all that time!

Bubble models are not about ongasing.. Buble models are about reducing bubble size.. hence the stops.. aimed at reducing potential bubbles..

[Jack Hammer]

Jax, look into scientific method... and watch the video again by Simon Mitchell you linked. He explains it well

- Jeff

[apitkin]

I read it -- I don't know how or what kind of bubble model they were using, but that deco plan sucked spectacularly!

Could someone please explain how those 70fsw - 40fsw were "stops" and not just multilevel diving? Of COURSE they were on-gassing all that time!

Perhaps one of those so-called 'experts' at NEDU? After all, they designed the study and from what you say clearly don't understand decompression physiology as well as you do.

To paraphrase Joe Dituri (and others): the consensus of experts in the field is that DCS probably has something to do with bubbles.

[Jax]

Perhaps one of those so-called 'experts' at NEDU? After all, they designed the study and from what you say clearly don't understand decompression physiology as well as you do.

To paraphrase Joe Dituri (and others): the consensus of experts in the field is that DCS probably has something to do with bubbles.

Let me rephrase this - does anyone know the bubble model they used in this study?

I have had a bubble model Uwatec for years. It NEVER gave me *anything* like that. No deep stops have been more than a minute or two. So, will someone help me out with how a stop at 70 has twelve minutes?

[Jack Hammer]

Let me rephrase this - does anyone know the bubble model they used in this study?

I have had a bubble model Uwatec for years. It NEVER gave me *anything* like that. No deep stops have been more than a minute or two. So, will someone help me out with how a stop at 70 has twelve minutes?

This was a scientific study in controlled conditions designed to minimize/eliminate variables. It was not a random subjective comparison using a tech divers wrist computer. It really is explained, I thought well, in the Decompression Controversies video you linked. Have you actually watched that video? If so, watch it again and pay more attention.

Again, spend a few minutes and read about what scientific method is and how it does not always look like the way the general population may go about things. I think it will help you to understand why things are done in what can seem to be an odd manner.



- Jeff

[floridabob]

Jax, while I always endeavor to be polite to my fellow CDF members, you're asking the wrong people to explain it. It's explained in the scientific papers and references at your finger tips.

And to be fair to you, you are probably not comparing apples to apples on these "deep stops".

Or maybe you are totally lost, who knows!

Bob

[Jax]

Jax, while I always endeavor to be polite to my fellow CDF members, you're asking the wrong people to explain it. It's explained in the scientific papers and references at your finger tips.

And to be fair to you, you are probably not comparing apples to apples on these "deep stops".

Or maybe you are totally lost, who knows!

Bob

That is very possible. I would simply like to find "their" bubble model because it is nothing like the one I have.

[Jax]

This was a scientific study in controlled conditions designed to minimize/eliminate variables. It was not a random subjective comparison using a tech divers wrist computer. It really is explained, I thought well, in the Decompression Controversies video you linked. Have you actually watched that video? If so, watch it again and pay more attention.

Again, spend a few minutes and read about what scientific method is and how it does not always look like the way the general population may go about things. I think it will help you to understand why things are done in what can seem to be an odd manner.



- Jeff

Well, I did learn a little bit about that scientific methods stuff in college. And when I picked up a specialty in determined Reliability, Availability, and Maintainability analysis. It is a bit of a requirement in engineering.

What I did NOT find in the video - did I miss it? What was the bubble model that generated the huge deep stops that were actually in the study. I would really like to find that, but searches on the specified name from the paper are not coming up.