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Mdemon · 25th February 2007, 09:18

At the other end of the scale, I've used a PO2 of 1.5-1.8 all the way up on some long deep dives. Many of us have sat through PO2's of 2-3 in the Pot without breakdancing too. CNS % goes through the roof.

At the high PO2 end there is a thought that CO2 brings on the high O2 symptoms (quicker). So, sat in a (dry) decompression chamber where they make you sit still, you can tolerate a couple of hours of high PO2. If you are working very hard and retaining CO2 and underwater, then you may have problems. In other words, practice your zen-like trance if you're going to be messing with high PO2s, otherwise stick to the agency guidelines. And of course, just like undeserved DCI, you may get unlucky.

Hope that wasn't too Nanny?

25th February 2007, 09:18	#3 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,927	Re: Real limits of PO2 At the other end of the scale, I've used a PO2 of 1.5-1.8 all the way up on some long deep dives. Many of us have sat through PO2's of 2-3 in the Pot without breakdancing too. CNS % goes through the roof. At the high PO2 end there is a thought that CO2 brings on the high O2 symptoms (quicker). So, sat in a (dry) decompression chamber where they make you sit still, you can tolerate a couple of hours of high PO2. If you are working very hard and retaining CO2 and underwater, then you may have problems. In other words, practice your zen-like trance if you're going to be messing with high PO2s, otherwise stick to the agency guidelines. And of course, just like undeserved DCI, you may get unlucky. Hope that wasn't too Nanny?
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