Decompression algorithms for recreational diving

[atdotde]

Next question: Who knows what these names/acronyms actually mean (and what they mean for your diving)?

 

[taimen]

Zürich Limits, 16 tissue compartments, algorithm subtype c, and with gradient factors.
The gradient factors, and how they effect dive planning within recreational limits is the interesting part. Also trying to figure out why manufacturers have picked up their GF pairs for different rec diving conservatism levels. To learn this I have done some reading including deco books.

The most helpful learning experience has been using Subsurface dive planner, playing with gradient factors to demonstrate how the setting would effect my dives. It is also very interesting to compare rec NDL:s with tech mode using DAN recommended GF 30/70.
This is the nice thing with computers using published algorithms.

Reading Pridmore's Scuba Physiological was also eye opening and puts much of the "exact science" in perspective.

 

[stuartv]

A general PZ+ question if anyone knows. Are all Z+ the same? (or is there capacity for the manufacturer or programmers to adjust it further)?
And can I confirm PZ+ = Z+?

Being proprietary, any manufacturer can adjust it as they see fit. @RonR works for Atomic. I think his post here:

Cressi Leonardo- Too conservative?

gives an excellent summation of the subject.

 

[RonR]

Being proprietary, any manufacturer can adjust it as they see fit. @RonR works for Atomic. I think his post here:

Cressi Leonardo- Too conservative?

gives an excellent summation of the subject.

Thanks, Stuart, but I should make clear I don't work for Atomic- we are independent developers who are responsible for coming up with the electronics and firmware design behind Atomic's Cobalt computer. I work very closely with Atomic and Huish Outdoors, but I don't speak for them.

-Ron

 

[arew+4]

DSAT, based on doppler ultrasound studies.

 

[scubadada]

A general PZ+ question if anyone knows. Are all Z+ the same? (or is there capacity for the manufacturer or programmers to adjust it further)?
And can I confirm PZ+ = Z+?

Oceanic and Aqua Lung computers, running the PZ+/Z+ deco algorithm, are both manufactured by the OEM, Pelagic Pressure Systems, now owned by Aqua Lung. The first dive NDLs for PZ+ and Z+ are exactly the same. I have always thought that these are the same algorithm, derived in some mysterious way from Buhlmann ZH-L16C by the folks at PPS. However, I do not know that for sure, and they are not saying. Personally, I think Aqua Lung just dropped the P, for marketing purposes. The P stands for Pelagic

 

[dmaziuk]

It's a good poll... very interested to see the results; although I feel Scubaboard members are likely to be more proactive in understanding such details than most divers.

I suspect those in the computer forum replying to a "decompression algorithms" post: even more so. Perhaps re-post in basic under "Computer poll" heading and see if you get any less than 90%.

And BTW I am able to tell what they call it and what the letters stand for. What all that means is... another story.

 

[scubadada]

I suspect those in the computer forum replying to a "decompression algorithms" post: even more so. Perhaps re-post in basic under "Computer poll" heading and see if you get any less than 90%.

And BTW I am able to tell what they call it and what the letters stand for. What all that means is... another story.

Yes, I thought about posting it under Basic rather than Computer

And yes, knowing anything about the algorithm your computer is running is an entirely different question.

 

[Jay]

I think his post here: Cressi Leonardo- Too conservative? gives an excellent summation of the subject.

It's an excellent summary by @RonR on p.4 (where your link takes you).

I did an algo/computer multi-dive summary (tables) using ScubaLabs data which seems to have put another thread to sleep, here it is for those that are interested: Place of dive tables in modern diving