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  1. #21
    The artist formerly known as petlowe.... PeterL's Avatar
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    Timely, I was talking to Dave Crockford about some DDRC diving he did back in the old and bold days...
    They ran the profile a few times in a pot then went out and did it for real........

    90M, 30 minutes bottom time, 90 mins back to surface, 4% N2 Heliox and PPO2's of 3.0 on deco using CCR+FFM... It worked.

  2. #22
    Established TDF Member nigel hewitt's Avatar
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    Quote Originally Posted by PeterL View Post
    It worked.
    My Russian O2 Rebreather is rated to 20 meters.
    Helium, because I'm worth it.
    Waterboarding at Guantanamo Bay sounded like a radical holiday opportunity until I looked it up.

  3. #23
    The artist formerly known as petlowe.... PeterL's Avatar
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    Quote Originally Posted by nigel hewitt View Post
    My Russian O2 Rebreather is rated to 20 meters.
    You mean Russians are rated to 20M on O2.
    Italians are rated to 12M.

    Some nationalities just don't have good care facilities for the elderly......

  4. #24
    Red Hot Totty ;) Hot Totty's Avatar
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    Quote Originally Posted by nigel hewitt View Post
    My Russian O2 Rebreather is rated to 20 meters.
    russian's are expendable
    www.wapsac.co.uk
    Apparently becoming a grandad

  5. #25
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    Quote Originally Posted by Turbanator View Post
    I'd read somewhere that our recommended limits were got by NOAA deciding the safe limits, then halving it.
    Not quite

    As Iain said, the original work is Kenneth Donald's, I'm not sure if there been any more experimentation since, or whether it's all extrapolation and fudge factors based on his work.
    Further work has been done, a nice summary is in a DAN article here: http://www.diversalertnetwork.org/me...ow_About_OXTOX

    And more reading can be done here: http://rubicon-foundation.org/oxygen-toxicity/

    I think those two must be about my most often posted links!

    cheers,
    Paul

  6. #26
    Moderator GLOC's Avatar
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    Quote Originally Posted by PeterL View Post
    90M, 30 minutes bottom time, 90 mins back to surface, 4% N2 Heliox and PPO2's of 3.0 on deco using CCR+FFM... It worked.
    Bugger the Oxtox risk, what about the DCS! What is the GF for that!

    Regards
    Gareth

    www.imagesoflife.co.uk - Underwater Print Sales, Teaching and Stock Library
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    www.divingincidents.org - Diving Incident and Safety Management System (DISMS)
    - 2014 Report here

    “Set your expectations high; find men and women whose integrity and values you respect; get their agreement on a course of action; and give them your ultimate trust.”

    “It is far better to be trusted and respected than it is to be liked.”

  7. #27
    The artist formerly known as petlowe.... PeterL's Avatar
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    Quote Originally Posted by GLOC View Post
    Bugger the Oxtox risk, what about the DCS! What is the GF for that!

    Regards
    This is second hand only sorry but as the tale goes, the thing ran clean on their deco models, then doppler using 2 chamber rides so for the sake of science they did it for real......
    As I said, older and bolder but you can't say it wouldn't have been the more entertaining way to see a wreck rather than the 5 odd hours hanging round like a mollusc.

  8. #28
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    Quote Originally Posted by PBrown View Post
    Not quite

    Further work has been done, a nice summary is in a DAN article here: http://www.diversalertnetwork.org/me...ow_About_OXTOX

    And more reading can be done here: http://rubicon-foundation.org/oxygen-toxicity/

    I think those two must be about my most often posted links!

    cheers,
    Paul
    Great stuff, thanks!


 
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