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Dive tables for accelerated decompression

Discussion in 'Advanced Scuba Discussions' started by 60plus, Sep 3, 2019.

  1. Dan_P

    Dan_P DIR Practitioner

    # of Dives: 1,000 - 2,499
    Location: Scandinavia
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    This is what happens when industries are left unregulated so main players can keep peddling gibberish like "sure, dive to 40 or 50 metres on air, it'll be fun!".

    The scientific evidence needed to support advocating "no deep air" (beyond approx. 30-36m) is the closest thing to ironclad I've seen in just about anything related to hyperbaric medicine.
    If one hasn't heard about it, one's probably listening to a rubbish channel.
     
  2. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
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    the coming scarcity of helium will make oc trimix diving really hard to justify though. and ccr has its own set of dangers. it will put DIR in a tough spot for a lot of diving in the 30m to 50m range.
     
  3. 60plus

    60plus Barracuda

    # of Dives: 50 - 99
    Location: Cumbria UK
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    I only mentioned the police divers used air in excess of 40m because someone else posted that at that depth He must be used. I live on the edge of the lake district where drownings are not uncommon and there are occasionally deep police searches. My computer (Zoop Novo) gives the max depth on air as 62m so there must presumably be some circumstances when air can be used at that depth or has Sunnto got it wrong?.
    This thread reminds me of the Aviva insurance advert - all someone asks for is a quick bit of information - a quote - then what they get is a quiz.
    I do actually agree with most of what most posters have written, but it just does not answer my original as to where dive tables can be found. Just because someone makes enquirers for information to assist in the assessment of the feasibility of something does not mean they are about to embark on that thing without proper research and training. I have now pretty well decided that any form of decompression diving is not really for me. I will probably look at carrying more air or lean nitrox to extend my dive time right up to my NDL and have plenty in hand for a slow ascent.
    Incidentally I recently saw and an uncontrolled ascent from about 28m at the end of the dive on nitrox 32. We had all gone to the shot line (I was part way up) when a diver shot up like a rocket in a stream of bubbles. When back on the boat he said that being in a bunch of divers [on the shot line] and in all the bubbles had confused him, he had pressed and held in the inflate on his BCD. He was still OK about an hour afterwards, but as this was a holiday dive group I will never see him again to know if there were any long term effect. Whilst on these dives I heard that there is now a recommendation that for dives in excess of 20 m a minimum 1 minute deepstop is taken at about 11 or 12m, anyone else heard this?
     
  4. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: U.S. East Coast
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    An old, mostly discredited, recommendation. You'll find plenty of threads on deep stops. If you look.
     
  5. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
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    right here:
    IANTD Open Circuit Flexible Dive Tables | Dive Gear Express®

    knock yourself out, nobody dives preprinted tables though.
    If they dive tables at all they are made on computer
     
  6. Soloist

    Soloist Solo Diver

    # of Dives: 500 - 999
    Location: North Carolina
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    You have a basic entry level dive computer that does not have gas switching capability, so per your original “dive plan” it would be relegated to a depth gauge. Numerous people have provided links to sites where you can buy IANTD tables, but it appears you expect someone to give them to you for free. Regarding the 62m air depth capability on your Novo, the speedometer on my sports car goes to 160 MPH, but I am certain the manufacturer does not recommend driving at that speed.
     

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