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Reconsidering Deep Air?

Discussion in 'Technical Diving' started by CAPTAIN SINBAD, Mar 23, 2021.


    CAPTAIN SINBAD Divemaster Candidate

    # of Dives: 200 - 499
    Location: Woodbridge VA
    Link to a great recent discussion with Dr. Simon Mitchell.

    In the light of the above, have your own views of deep air / extended range diving evolved, or do you believe that deep air dives to 187 feet are OK as long as you keep your exertion levels and work of breathing in control?
    wetb4igetinthewater and JohnN like this.
  2. kelemvor

    kelemvor Big Fleshy Monster ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Largo, FL USA
    An error occurred. Please try again later. (Playback ID: 8i-4-yD1pGEcXc4E)
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    Your video doesn't work.

    IMO Deep air is a mistake. Use helium beyond 130. Rather, that's what I would do. You do whatchalyke.
  3. grf88

    grf88 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Markham, Ontario
    Works for me.
    Video that is.
  4. grantctobin

    grantctobin ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Chicago
  5. helodriver87

    helodriver87 DIR Practitioner

    # of Dives: 500 - 999
    Location: New Mexico
    Planning a dive with that kind of gas density and narcotic potential and using exertion control as risk mitigation is like planning an overhead dive with an overly aggressive gas plan and using "not silting it up" as mitigation.
  6. scubadada

    scubadada Diver Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Philadelphia and Boynton Beach
    I occasionally dive air or lean nitrox to deeper than 130 feet. I dive nowhere near the air MOD
    Blueringocto_73 likes this.
  7. evandroairton

    evandroairton Instructor, Scuba

    # of Dives: I just don't log dives
    Location: Ribeirão Preto - Brazil
    I can't see a point for not using a helium mix, if available, deeper than 45 metres.
    Have done 60 metres on air before, it was crystal clear warm water, but, wouldn't do again, specially on the far from ideal conditions we have here at brazilian southeast region.
    Specially on CCR
  8. mac64

    mac64 Contributor

    # of Dives: 5,000 - ∞
    Location: Ireland
    Personally I don’t have a problem diving deep on air. And the video confirmed for me that for some people gas density is not a problem but is for others. Nothing new. It’s a personal decision.
  9. Tracy

    Tracy Tech Instructor / Captain ScubaBoard Supporter

    # of Dives: I just don't log dives
    Location: Livonia, MI
    Not at all. I see no reason to consider deep air in a place with helium readily accessible.
    I have been there and done that, I now have the knowledge to not make the same mistakes again.
  10. Wibble

    Wibble Contributor

    # of Dives: 500 - 999
    Location: UK
    Rebreathers make all the difference. Gas bills of well over $100 are reduced to $10. Helium can be used for almost every dive and definitely deeper than 30m / 100'.
    tomfcrist and evandroairton like this.

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