Calibrating O2 for Altitude

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That 1-2% difference in O2 can kill you at depth. A 1% difference results in almost a 20' difference in MOD in the 250'+ depth range.
 
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Reactions: Jax
So basically, I should use a scuba tank filled with air to calibrate it?
 
Yes, that's the recommended calibration method.
 
https://www.shearwater.com/products/swift/

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