Glad you liked it! Any other topics you'd like to see?

I'm glad you enjoyed it. Thanks

Thank you so much. Glad you enjoyed the content.

Thanks for the kind words.

Thanks!

Glad you enjoyed it. At least now you know why you can't hold your breath indefinitely 🤔

Glad you like it!

If you can breathe - that's a plus. Most other things are pretty standard like if you were to get a DOT physical for truck driving. Some are slightly more stringent. There's a bunch of standards in part 67. See below www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-67?toc=1

@@PrivatePilotGroundSchool well I'm glad I quit smoking like a year ago lol

I know. That sounds like a lot of time. I have 2 theories. Maybe the figure includes everything up to 20k. Or it could be that it's such an exponential decline after that altitude. The FAA has an AC that has time of useful consciousness explained a bit more. "TUCs are based on data that represent average values and reflect wide variation among individuals in time to incapacitation. This variation results from differences in an individual’s total surface area for gas exchange in the lungs, total amount of hemoglobin available in the blood to bind oxygen, and oxygen consumption rate at rest (related to body mass index). Other sources of variation are the extent to which hypoxia stimulates increases in depth and rate of breathing, and increases in the amount of blood the heart pumps (faster heart rate). Finally, individuals able to increase the amount of oxygen they can extract from the blood in muscle and brain tissue are more hypoxia tolerant. This is largely genetically determined, but can be enhanced by physical conditioning resulting from a regular aerobic exercise program. As many of these factors will be unknown by the aviator, the safest approach would be to assume the lower TUC value is limiting."