Am I correct to assume that cruising at 12,500' is ok, above it for 30 minutes or more is deadly?FAA regulations require that supplemental oxygen must be used by the flight crew after 30 minutes above 12,500ft, continuously above 14,000ft, and offered to passengers above 15,000ft. It would be reasonable to suppose based on this that Accusim is calibrated such that you risk hypoxia above 12.5k.
Thanks for you help
Peace!