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I was just reading the latest edition of deep tech, and read the article
on the boy's that were diving in merimac cave system.
One of the fellows said he used 20/20 trimix for break gas, I was
wondering what the advantages  or disadvantages are. I understand that a
lower O2% would be good, but what about the 20% He?

John Ivanic      comments:  ivanic@di*.ne*

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