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What computers are you using for tech dives?

Discussion in 'Technical Diving Specialties' started by Cyborg Pirate, Aug 27, 2017.

  1. rongoodman

    rongoodman ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Albany, NY
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    I think you're going to need to provide some support for these assertions. "Suicidal counterdiffusion" from 21/35 to 50% would imply a lot of episodes of ICD from a very common combination(N2 is only increasing from 44% to 50% at the switch). Mitigation strategies for ICD usually involve decompression gas choices, not prolonging decompression times.
     
    Last edited: Nov 17, 2017
    PfcAJ, kensuf and RyanT like this.
  2. kensuf

    kensuf Cave Instructor

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    Hi Tom,

    Can you give us one documented case of ICD that was caused by going from a normoxic trimix to 50% nitrox at 70' during decompression?

    Just one.

    Thanks,

    Ken
     
  3. TrimixToo

    TrimixToo Regular of the Pub

    # of Dives: 200 - 499
    Location: New York State
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    Please show us the exact profile you think would cause an ICD problem on a switch from 21/45 to EAN50. (Hint: Even at the MOD for 60 minutes, the PPN2 and PPHe, and the sum of the two PPs, are continuously decreasing on deco <edit> except for a tiny bump in PPN2 if you switch at 70' that you can avoid by switching at 60'.)

    I'll add that 21/45 is a bit of an oddball mix for open circuit. Far too much O2 to go very deep, and more He than necessary at its MOD.

    Edit: Clarify my "hint."
     
    Last edited: Nov 17, 2017
    victorzamora likes this.
  4. LiteHedded

    LiteHedded Great White

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    BsEtk42.jpg
     
    JohnnyC, victorzamora and PfcAJ like this.
  5. PfcAJ

    PfcAJ Orca

    # of Dives: 5,000 - ∞
    Location: St Petersburg, Fl
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    Are you REALLY a Suunto employee? This is representative of Suunto's knowledge of DCS and diving practices? This must be really embarrassing for your supervisor.

    I'm not interested in using a Suunto dive computer in the slightest, and this solidifies my opinion. Absolute nonsense.
     
  6. victorzamora

    victorzamora Solo Diver

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    Remember that it's not just an ICD "hit." It would have to be bad enough and consistent enough for Tom to call the practice "suicidal."
     
    kensuf likes this.
  7. kensuf

    kensuf Cave Instructor

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    I can't even fathom how many normoxic trimix courses made such a suicidal gas switch. Wait..
     
    shoredivr, macado, JohnnyC and 2 others like this.
  8. 100days-a-year

    100days-a-year Solo Diver

    # of Dives: 5,000 - ∞
    Location: NE Florida
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    imagination.gif
    Found the conditions under which ICD became such a threat.
    Going back to screenshot that post before it gets deleted to use as another reason not to recommend Suunto for anyone not an elderly overweight smoker and drinker with a PFO .
     
    kensuf and victorzamora like this.
  9. victorzamora

    victorzamora Solo Diver

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    I'd guess somewhere at least 95% of them.
     
  10. PfcAJ

    PfcAJ Orca

    # of Dives: 5,000 - ∞
    Location: St Petersburg, Fl
    7,343
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    Can confirm, am dead.
     

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