Quote: (Originally Posted by
bgpartri)

no one can detect CO2 at high levels of exertion like swimming hard against a current. (10 METS)
This in my opinion is totaly untrue.
In my experience the symptoms of retained CO2 are the same shallow or deep mild exersion or high - its a matter of being sensitive to recogise those symtoms. We 'feel' retained CO2 on most dives where we have to swim a bit. We pull back automatically if we feel we are exerting too hard (that feeling is recognising retained CO2) I had to stop after 35mins fighting flow mainline Ginnie few months back. I was swimming my ass off against the flow non stop flat out for 35mins dragging all my stages and boris with me - but I still recognised the symptoms of rising CO2 and took action to fix it. On many wreck dives fighting current pulling down lines etc Ive had the same recognition and have taken same action to fix and continue the dive. Had strong feelings of rising CO2 during descent around 170m depth in a cave and took action to solve it (and once recovered continue my descent)
Am I the only diver who continuously listens to his body on a dive???? Im sure not.
I mean its hardly rocket science. You start to feel increasingly anxious, feel increasingly uncomfortable, increasingly stressed, maybe panicy, your RMV is increasing....these are not IMO easy symptoms to miss.....and the more times you experience them the earlier you recognise them the next time. - hence the training observation.
Quote:
But pushing your scrubber because you think you can detect CO2 in all situations is a very different thing.
I agree but we are talking about retained co2 which has nothing to do with the scrubber