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In the current WETNOTES magazine (a German Tek diving issue) there is a whole page Advertisement for OSTC. In there it says "GF-Erweiterungen (DeepStops)" (Erweiterungen means Extensions). May I ask what this means? In my understanding the OSTC does not support deep stops in the meaning of Pyle deep stops, does it?

Actually this is a topic I wanted to throw in some while ago and now that there are the next Beta releases on the door steps this seems to be a good time.

I'd be happy to see (additional) deep stops beside the GF bsed deco stops also. They should be configurable through a CF and just be shown (no penalty or anything if one is "missing it"). For deco calcultaion the CF could define a time to stay there so this time could be taken into account.

For my self I calculate them roughly by (depth + first deco stop)/2 and is there still a big difference to the 1st deco stop afterwards I'll do another one until I'm near the first deco stop (which may decrease doing deco stops of course). I'm sure there are more official and more scientific ways to calculate them.

What do you think? How do you calculate your deep stops?

Hi Solodiver,

as far as i can see in the deco code oft the ostc it does not support deepstops.

I think there is an missunderstanding in "what is a deepstop". The OSTC supports gradient factors and that is, from my point to view, not similar with deepstops.


From my point to view, deep stops (i.e. Pyle Stops) make no sense. The latest research arrive at that conclusion. But that's just my 2 cents.

Best regards
Rob

Guys,

You may wish to read the proceedings of the 2008 "decompression and deep stop workshop" that was sponsored by the Undersea and Hyperbaric Medical Society, DAN, US ONR, PADI and NAUI.

All mayor researchers and famous divers were there, presented their evidence, their theories and had strong discussions around them.

Quite interesting reading.

Part of the conclusion includes a discussion on model derived deep stops (either bubble or manipulated gas content) and empirical (as in voluntary, empirically derived).

So from the latest scientific and industry discussions the OSTC does provide deep stops when in ZHL-GF. It just happens that they are modified gas content, model derived deep stops.

Now, I'm happy (rightly or wrongly) to follow a relatively tested model (GF). In turn I see little value in asking the developers to add modelling capabilities based in a "mark to best wishes" untested theory.

My two cents.

I perfectly agree with dmainou.

You should have a look at the Eric Baker's paper :

Clearing Up The Confusion About “Deep Stops”

And the diagram he made to comment about Richard Pyle's original Deep Stops method.

OSTC strictly implement the Eric Baker's Gradient Factor, which provides cleaner decompression diagrams, which are now recognized as providing less overpressure in compartments, and provide a better security margin during the whole decompression.

My two cents words, too.

Jeando,

Thanks for the link

Cheers,
DB