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Spend 4 or 5 minutes at a pO2 greater than 1.6, briefly spiking to 2.3 at a depth of 328 feet and you will probably be O.K. Most of the time anyway.
Too many unknowns though.
Oxygen toxicity isn't set for 1.6, we will not automatically pass out if we go beyond. And there is evidence to suggest that we can improve our tolerance to ox-tox.
That said the amount of factors that come into play e.g diet, exercise etc, make it a real game of chance.
Some days we may be quite capable to deal with 1.8; when all other factors are in order. Conversely though, we can reduce our tolerance to ox-tox with, prescription drugs, cold, dehydration etc etc.
The risk is not worth the reward. As recreational (which we are, even when we tech dive) divers we should adhere to the 1.6 rule purely for safety. We are not navy seals.
Last edited by the wart; April 15th, 2011 at 03:10 PM.
Reason: really should proof read
Oxygen toxicity isn't set for 1.6, we will not automatically pass out if we go beyond. And there is evidence to suggest that we can improve our tolerance to ox-tox.
That said the amount of factors that come into play e.g diet, exercise etc, make it a real game of chance.
Some days we may be quite capable to deal with 1.8; when all other factors are in order. Conversely though, we can reduce our tolerance to ox-tox with, prescription drugs, cold, dehydration etc etc.
The risk is not worth the reward. As recreational (which we are, even when we tech dive) divers we should adhere to the 1.6 rule purely for safety. We are not navy seals.
Totally agree with all that. At some point it becomes Roulette rather than Science.
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Originally Posted by ianr33
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