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  1. cenotist

    cozumel accident 9/4/11, THE FACTS

    There is no point in analysing this dive with V-planner, which is using VPM - B model. “The dive profile from a VPM-B profile is a one that includes both deep stops and modest amount of time in the shallow areas. The basic concept of a bubble model is to limit and control bubble growth and...
  2. cenotist

    cozumel accident 9/4/11, THE FACTS

    I can see, that Thalassamania is busy answering other subjects and is not falling into my trap of IWR. So I shall answer my hypothesis myself. Navy Dive Man rev6 says about o2 IWR: - Descend to a depth of 30 feet with a standby diver. - Remain at 30 feet, at rest, for 60 minutes for Type I...
  3. cenotist

    cozumel accident 9/4/11, THE FACTS

    The VPM - B model is not designed for this kind of dives.
  4. cenotist

    cozumel accident 9/4/11, THE FACTS

    I agree, but when this "as quickly as possible" is in a unknown and vague future? Sorry, I am trying to act as a devils’ advocate.
  5. cenotist

    cozumel accident 9/4/11, THE FACTS

    OK. Let me rephrase my question. After this extreme down-up dive and being bent, what does make more sense: 1. be on a boat, breath o2 and wait (slower off gassing, more pain, but more safe environment) 2. be at 20-30 ft in the water with o2 (faster off gassing, minimising the risk of...
  6. cenotist

    cozumel accident 9/4/11, THE FACTS

    Yes, Brules. I know the textbook answer to my question. But being at 30ft on o2, you are not taking in any nitrogen, and you keep the diameter of your nitrogen bubbles inside your tissues 24% less than at the surface, what means your off gassing is more efficient.
  7. cenotist

    cozumel accident 9/4/11, THE FACTS

    So far the discussions have been: 1. How tolerable are “off duty” deep air dives at all (is it your own risk or you are responsible for image of safe dive society). 2. How well was executed the emergency plan at this dive. 3. How adequate were the actions of captain 4. What are the...
  8. cenotist

    Cozumel Incident 9/4/11

    No, Dirty-Dog it is not completely rubbish. Your ignorant mind works quite well. I am one of the tec-divers who is guilty doing my tec-dives mixed with rec divers. How it works, is that I always give the captain copy of my profile, so he knows how to plan the dives. Depending on my plan and...
  9. cenotist

    Dealing with Downcurrents

    Exactly my point. As I said, I do not question the quality of Cozumel fills (if we get 1-2 percent different reading on the gas, it is probably the bad calibration of our tools ;) ) another thing is how much do you trust that this good fill ends up with you in a dive. Do we pin our fight to this...
  10. cenotist

    Dealing with Downcurrents

    And just a little bit of math with quite extreme numbers for repetitive ow rec dives: 1st dive EAN32 @ 120 ft for 60 min (ppO2=1.47 ATA) = 50% CNS Tox Surface interval for 60 min residual CNS Tox 31.5% 2nd dive EAN40 @ 83 ft for 90 min (ppO2=1.4 ATA) = 58.5% TOTAL = 90% CNS Tox, what is well...
  11. cenotist

    Dealing with Downcurrents

    I am sorry, to jump into this thread, but in my opinion the down currents are far less dangerous than the up currents. Instead of talking about getting down fast, it is far more relevant to talk about getting up fast and causing the helium/nitrogen/… bubbles in your tissues/blood/&#8230...
  12. cenotist

    Cozumel Incident 9/4/11

    Just before I leave this thread - right now there are people who are in need (not only for sympathy) and regardless that I do not fancy this kind of cowboy diving at all, I think, it is human to show compassion and give financial support. If not for them, then at least for their families. Maybe...
  13. cenotist

    Cozumel Incident 9/4/11

    Tell, please, what more truth are you looking for? You know: - dive plan was to go deep - narcosis took over - all made to the surface - bad decision was to go for IWR - all end up in the hospital Also you know there was no any killer down current and Cozumel is as safe place to dive as other...
  14. cenotist

    Cozumel Incident 9/4/11

    I can really recommend Caribbean Divers. On demanding dives I can always trust my life in the hands of their captain. They know what they do.
  15. cenotist

    Cozumel Incident 9/4/11

    Maybe this time I shall paint it red… Every one of us is built differently. There is no point to read stories about deep air dives and then jump into water and try to imitate it. Bret Gilliam: “I have also made a career of understanding the underlining physiology to the point where...
  16. cenotist

    Cozumel Incident 9/4/11

    “PARA LA GENTE QUE NO SABE DE ESTO SOLO LES PUEDO DECIR QUE ESTOY ASÍ POR SALVAR UNA VIDA” It is really good to hear that Gaby is with us. What is not good, that he says, that until 300 ft everything is OK. “I am here in this state, because I saved the life”. Maybe it will be more accurate to...
  17. cenotist

    Cozumel Incident 9/4/11

    I believe you forgot to mention, that you “popped out” from 20 ft, not from 200 ft. Not that it is wise to breath o2 below 30 ft, but…
  18. cenotist

    Cozumel Incident 9/4/11

    As far as I understand, Accidents and Incidents forum is for analysing accidents and drawing conclusions, so that we can learn from them. The gray matter in our heads should tell us: 1. Recreational limits are for safe diving (if you do not have health problems) 2. You can exceed these limits...
  19. cenotist

    Cozumel Incident 9/4/11

    And Usain Bolt runs 100m 9,58. How about you?
  20. cenotist

    Cozumel Incident 9/4/11

    And let us not forget narcosis!!! Many of us have severe narcosis from 150-200 ft. Including delayed reaction, deceitful feeling of confidence, slow analysis, dizziness, deceptive vision, short loss of memory,… When technical divers do their test dives to see their narcosis level, they...
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