Birdwatch Note Rating
2024-07-06 07:30:48 UTC - HELPFUL
Rated by Participant: 0713D2D6E688994CA5FB58EC885DBFA0EB330A9B31098F76D49C9AB96F37D17E
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Original Note:
A diver takes a breath and exhales all the compressed air (not pure oxygen) so tanks decline in pressure per breath volume. https://en.wikipedia.org/wiki/Scuba_diving A space suit scrubs CO₂ from exhaled breath (which still contains plenty of O₂) which is then rebreathed increasing the O₂ supply's duration. https://www.nasa.gov/wp-content/uploads/static/history/alsj/ALSJ-FlightPLSS.pdf
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