Quote: (Originally Posted by
CharlieT)

Yes, I do understand the difference in offgassing between 4m & 6m but in UK sea conditions 4m is usually considered too shallow for decompression anyway so that would override any alleged new recommendation from IANTD.
I would like someone to explain (in simple words) why they think there is a difference in off gassing rates at different depths with a FIO2 of 1.0.