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I'm sorry you had to go through so much trouble before finally finding the cause, but what has this got to do with my comment specifically, and what we're discussing in this thread in general? The question is whether average depth and/or the modified rule of 130 is safer as a backup to diving with a DC and backup DC.That’s a dumb comment. I’ve been bent more times than you can imagine. Mostly sub clinical dcs or skin bends. Some minor visual disturbances. I was also dead ass tired after every dive. As my dives progressed and skin bends got a little worse (meaning I couldn’t blame my drysuit for it he skin marks), I got tested for a pfo and was negative. Kept diving but got way more conservative and the dcs symptoms occurred less. 6 years later I was able to find a cardiologist who could actually locate the pfo. It’s been fixed and now after dives I feel invigorated. So much that I annoy my wife.
I will counter oya’s response to you with this opinion. You’ve likely been around someone with dcs or even had it yourself. The problem is it’s often sub clinical.
The guy below him is not breathing from a bag. May be the bag is just half full of freshwater & air with siphon. He use the siphon to seep the water and blow air into the bag to control the buoyancy when he carries heavy catch?It looks like he's breathing from a tube extending up from the goat bag. If that's the case, why is he breathing from a bag if he is just floating on the surface?
arguing from an exception (pfo) is not convincing. It's a logical fallacy called the missing middle.