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NOAA dopuszcza 30 minut z PpO2=2.0 ATA w ramach tzw. "exceptional exposures".
Oraz:
Research done at the Navy Experimental Diving Unit (NEDU) in 1986 specifically looked at how brief exposures to oxygen partial pressures of 2.0 ata or greater would impact the overall exposure time at 20 feet / 6.1 meters of sea water (fsw).
[...]
The best that could be said is that a single 15-minute excursion to 40 fsw/12 msw, or for five minutes at 50 fsw/15 msw, probably had no significant effect. This formed the basis of the current U.S. Navy recommendations.
Źródło:
http://www.diversalertnetwork.org/medic ... ticleid=35Serdecznie pozdrawiam.