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Thread: Dive computers, deco and tissue compartments

  1. #11
    Guru HP's Avatar
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    Quote Originally Posted by Mark Powell View Post
    Are you refering to the US Navy Study. If so I wouldn't draw quite the same conclusions.
    Please feel free to pick holes in that / add your ten cents worth Mark - you're more of an authority on these things than I am.
    "Some people could f**k up a baked potato..." Squeaky McTight / David Mamet

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  3. #12
    Jesus don't want me for a sunbeam NotDeadYet's Avatar
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    Quote Originally Posted by BJ View Post
    Just to put a spanner in the works, the latest research suggests that on dives with mandatory decompression stops, deep stops increase the risk of DCI. So it seems bend-and-mend is getting rehabilitated! I'll try to find the reference.
    I think you also need to combine that with the thousands (millions maybe?) of dive hours done on "bend and mend" tables without any incident prior to the recent invention of technical diving in about 2004.

    I think there is a misconception that certain models are "wrong". They aren't, they're just different. Early VPM bent more people than a bottle of Lambrini and a night in with a DVD of Spartacus.
    "i think this post displays/encourages a stupid if not dangerous example/attitude. This applies to ALL your posts so far"

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    Quote Originally Posted by Garf View Post
    Get in the water often enough and you'll take a hit. All you can do is minimise the probability and try to start getting a feel for what works for you and what doesn't.
    Yep, 100s of silly profiles, repetitive deep dives with short SI, diving when I shouldn't (on the beer the night before) and then got hit on 2 normal profiles while well hydrated.
    It's a numbers game

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  6. #14
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    Early VPM bent more people than a bottle of Lambrini and a night in with a DVD of Spartacus.
    We must try that some time

    I guess it's worth remembering that the window of what works at a recreational level is pretty huge, normally the consequences of pushing it a bit or getting it wrong are feeling a bit knackered afterwards (until they're not and you get bent )
    "Some people could f**k up a baked potato..." Squeaky McTight / David Mamet

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  7. #15
    Notice my avatar. I am hard astern. BJ's Avatar
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    After several thousand dives and reaching the age of the Winter Fuel Payments, I've never suffered a bend nor needed to be recompressed. What's it feel like?



    In the immortal words of my old deep-diving friend Dr. Ahmed, "I don't do that deep-diving shit no more."
    Last edited by BJ; 18-02-10 at 07:19 AM.
    Author of Amazing Diving Stories (Wiley Nautical). Consistently the top-selling scuba diving book on Amazon.

  8. #16
    Jesus don't want me for a sunbeam NotDeadYet's Avatar
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    Quote Originally Posted by BJ View Post
    After several thousand dives and reaching the age of the Winter Fuel Payments, I've never suffered a bend nor needed to be recompressed. What's it feel like?
    Hurt like f**k... having been bent using a deep stop algorithm...
    "i think this post displays/encourages a stupid if not dangerous example/attitude. This applies to ALL your posts so far"

    "Faith is the surrender of the mind" - Christopher Hitchens

  9. #17
    New Member jonny4846's Avatar
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    Get to your earliest off-gassing stop ASAP... deep stops while on-gassing are doing very little for your bubble reduction, even in the fast tissues and then take your time adding extra min's to the off gas stops...

    Jonny, too many variables and too little known....

  10. #18
    Guru HP's Avatar
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    Quote Originally Posted by jonny4846 View Post
    Get to your earliest off-gassing stop ASAP... deep stops while on-gassing are doing very little for your bubble reduction, even in the fast tissues and then take your time adding extra min's to the off gas stops...

    Jonny, too many variables and too little known....
    How do you define you earliest off-gassing stop then?
    "Some people could f**k up a baked potato..." Squeaky McTight / David Mamet

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  11. #19
    New Member jonny4846's Avatar
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    Quote Originally Posted by HP View Post
    How do you define you earliest off-gassing stop then?
    It's all semantics at this stage, but using Haldane's ratio 2:1, it's about half your operating depth. And I use 'abouts', delibrately. Thats when under normal circumstances and time dependant even your slow tissues begin to off gas... Our studies and intelligent theorising has fudged beyond what is or is not safe dive practices...

    we'll never know...

  12. #20
    GUE Tech instructor RichW's Avatar
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    So if you ascend to 50% of depth, all tissues would be off gassing?

    Rich
    GUE education and diving with Rich Walker.
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