OP
supercritical
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Perhaps instead of writing "Difficulty with AAS", it should be "Difficulty with switching to bailout regulator".
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Perhaps instead of writing "Difficulty with AAS", it should be "Difficulty with switching to bailout regulator".
It's certainly more difficult, but not impossible. I don't regularly dive with a backup mask, but I do have an AAS. I am comfortable making an ascent without a mask on and opening my eyes under water. If I was forced to make a technical dive on FFM, I would carry a backup mask in my pocket.
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Not if you're the one needing the gas. However, I saw a little gismo when I did my rebreather training. I could actually change tanks mid water if it had this connector in place. I am thinking of the possibilities of using it.