Quote: (Originally Posted by
Genesis)
3. Know how fast your PO2 drops when on loop if you have no injection. Don't know? Test it on the couch and remember that for every atmosphere down it drops SLOWER, so this is most dangerous on or near the surface.
This is something I have seen quoted in a number of places including IANTD's training manual for MOD2.
As I see it this is WRONG! The number of molecules of O2 in the loop to acheive a PO2 of eg 1.3 at 10m is exactly the same as the number required to acheive the same PO2 at 110m.
Therefore given the same O2 consumption, the PO2 will decline at the same rate whatever the depth.
I'm concerned that people will be lulled into a false sense of security by thinking that their PO2 will drop slower at depth than they have seen/tested on the surface.
Neil