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George,
Given that you've just said that these examples are little too short
to be really useful, I'm not sure how relevant this can be, but ...
QUESTION: How would you modify your example in the case of loss of
access to one or other deco gases?
This is more out of interest of the deco mechanics rather than
actually planning on encountering these situations <g>
Using JJ's settings for decoplanner, losing the O2 adds 11 minutes
at 20 feet breathing the 50/50, or, if you stick in an extra 10 foot
stop, just 9 minutes in total are added.
Loss of the 50/50 adds a total of 36 minutes to JJ's deco, primarily
across the 40,30, and 20 foot stops.
Just for laughs, loss of both deco gases adds 100 minutes to the deco
if you add the 10 foot stop, and without the 10 foot stop, 247 minutes!!
Thanks for all this good stuff. However, I'm in serious trouble of
getting the sack/divorced, spending most of the day/night armchair
diving with decoplanner <g> Roll on the weekend for the real stuff...
>I think the problem is the dive is too short for the algorithm. JJ uses
>helium based deco gas on the longer dives, and has told me that he
>believes it shortens them but that the "formula" lengthes the short
>dives. I don't use any softwware, and so do not know for sure. The
>problem is that while JJ is attempting to get out something that
>approximates the deco that we actually do, he and I really only do dives
>that are pretty much off the scale in bottom time length to start with,
>and the rules change markedly. The story there is that just to do a
>normal cave dive in our systems implies bottom times approaching 100
>minutes for everything at depths from 150 to 300, with a "norm" being
>200 for 100, so again, what works does not always appear optimal for
>short dives, but look at it this way: the big issue with me and JJ is to
>get out of thes dives , and all dives , with no physical damage, so
>while he and I may look like extreme weenies on a short dive deco-wise,
>we look like crash test dummnies on a long dive, but both get out ready
>to rock .
>Just remember, phsyiologicly , helium is your friend, oxygen is yrou
>enemy. Try to construct your deco so that the one decreases the need for
>the other. Nitrogen is poison - and you need to be treated with oxygen
>after you use it.
>
>I copied this to techdiver since it is a great post by you , and will be
>a question everyone asks. Thanks. I'd go right to JJ for more info. He
>has put a lot into this, and he not only konws every thign I know, he
>knows how to apply it to people other than the two of us.
>DeepTrimix@ao*.co* wrote:
>>
>> George,
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