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  1. JohnnyC

    DIR- Generic gradient factors

    50-60/75-80
  2. JohnnyC

    Is Open Circuit Trimix dying a slow death?

    Yeah, you'd think that would work. Except it doesn't. Matheson, Airgas, Praxair, and a couple other small specialty gas suppliers here will not sell helium outside of medical and established account holders. Believe me, I bought a new engine drive a week ago and asked to put a T of UHP on it as...
  3. JohnnyC

    Is Open Circuit Trimix dying a slow death?

    None of my local gas suppliers can even get helium outside of their medical customers and long-standing account holders. Literally the hospitals and the shop that makes UH-60 Blackhawk parts are the only ones that can get high purity helium. I can beg, borrow, and steal remnants out of the...
  4. JohnnyC

    A BC cave

    Nice dude.
  5. JohnnyC

    Legal considerations for the Fire on dive boat Conception in CA

    EVERYTHING on a boat is an accelerant. Resin/epoxy impregnated plywood, polyurethane foam like KevinNM mentioned, etc. As for lithium battery fires, there's plenty of evidence in this thread showing just how energetic they can be. The NASA rover video is a good demonstration of how quickly and...
  6. JohnnyC

    3/8” 90deg adapter

    Guys! Stop it! Brad's just enlightening us to the superiority of the OSEL product. After all, if all you ever dive is a pdf, it will always be better than anything else on the market! He's lucky the TOS protects him from what people really think.
  7. JohnnyC

    Fathom CCR vs JJ-CCR

    They're fundamentally different units. There's no "nuance" between them, they operate in a completely different manner, and something like the weight of the loop hoses or what mouthpiece each unit comes with is so far down the list compared to the BIG differences. It's like asking for the...
  8. JohnnyC

    Fathom CCR vs JJ-CCR

    Are there specific differences that you're interested in? They're significantly different units in terms of their method of operation and their operating principle.
  9. JohnnyC

    Two German divers drown at Gran Cenote Kalimba at Tulum

    I doubt special gas rules for photography or videography would make much of a difference in most cases since every dive may be different. I think a far better solution is a well-defined set of roles whenever the intention is to film/survey/etc. Camera guy is camera guy. That's it. Pressure and...
  10. JohnnyC

    Fiona Sharp death in Bonaire

    Gag straps work when you have a buddy. Without a buddy, the confluence of circumstances the would have to occur for a gag strap to enable a self rescue are pretty close to impossible. That's not a condemnation of gag straps, I have them on both rebreathers, but the idea that having a gag strap...
  11. JohnnyC

    Perdix question (High P02)

    Curious what software version you're running. They changed the way MOD and alarms work in the latest software release.
  12. JohnnyC

    Fiona Sharp death in Bonaire

    Not necessarily, if you were working hard you would have to add more often than you normally would. And if you had a rather low bottom PO2 for whatever reason. If you had a needle valve and you hadn't opened it enough or it had accidentally closed, the addition rate wouldn't be what was...
  13. JohnnyC

    Fiona Sharp death in Bonaire

    I have heard of a case where a diver diving an mCCR went hypoxic while heavily working and passed out. Because he went from a working level of consumption to basically none, the unit was still leaking O2 into the loop, and he reached a point where the PO2 was high enough and he regained...
  14. JohnnyC

    twist, button or hand held for DGX 600

    Depends on the application. Technical diving backup light? Get the twist, it's harder to activate accidentally. Easy recreational night dives or poking into nooks and crannies? Whichever floats your boat. Button will be more convenient, and usable with one hand.
  15. JohnnyC

    Rebreather Acronym Glossary for Dummies

    Like the non-user serviceability, counterlungs and RMS? :rofl3::rofl3::rofl3::rofl3::rofl3::rofl3::rofl3: Sell that POS and buy an SF2 already!
  16. JohnnyC

    Crew member sues Conception

    For those of us that don't speak legalese, or the implications of staying the case, how about a little explanation of what this potentially means other than simply a pause in proceedings?
  17. JohnnyC

    Back at it.

    Joel Silverstein's operation is out in Lake Havasu City. He's been around the block. It might be worth getting ahold of him. I've never met him personally however, this isn't an endorsement, just information.
  18. JohnnyC

    Fiona Sharp death in Bonaire

    Kindly refrain from reposting that piece of trash, fraudulent, utterly ******** piece of “research” on this site. Reply if you want. I’d be more than happy to take part in a discussion.
  19. JohnnyC

    Forgotten experiment "Neon 400"

    Super cool! Thanks for posting this. It's very interesting!
  20. JohnnyC

    How common is solo RB diving?

    Not uncommon.
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