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Old November 6th 15, 01:41 PM posted to rec.aviation.soaring
son_of_flubber
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Default Oxygen regulators, medical type

Edited for clarity:

Dr Dan wrote a good article about the UNRELIABILITY of using a pulse oximeter to evaluate the efficacy of your supplemental oxygen system:

http://www.danlj.org/~danlj/Soaring/...-p18-20-22.pdf