HJeffreyM
Contributor
I recently returned from my first dive trip where I used EAN(32) for all dives. My initial reaction is very positive with the "anecdotal" effects of post-dive wellbeing vs. air seeming true for me at least. I also enjoyed watching the nitrogen loading indicators on my DC dissapear almost before my eyes!
I also followed some advice that was not in the PADI EANx manual, but was suggested by the instructor I took the class from:
I generally still had 700-900psi left in the tank when I hit my 15fsw safety stop. After the stop, I would proceed to about 10fsw for a couple of minutes, then 5fsw...in other words, breathe the tank down as close to 500psi as possible while at very shallow depth. Theoretically, I would then be off-gassing faster on EAN32 than I would breathing air (EAN21) at the surface?
Aside from slowing my ascent from 15-0fsw to a snail's pace (good), is there an off-gassing advantage in the above end-of-dive profile? Would I be better off doing a normal ascent from 15fsw and sucking down the rest of the tank while sitting on the boat?
Happy diving!
I also followed some advice that was not in the PADI EANx manual, but was suggested by the instructor I took the class from:
I generally still had 700-900psi left in the tank when I hit my 15fsw safety stop. After the stop, I would proceed to about 10fsw for a couple of minutes, then 5fsw...in other words, breathe the tank down as close to 500psi as possible while at very shallow depth. Theoretically, I would then be off-gassing faster on EAN32 than I would breathing air (EAN21) at the surface?
Aside from slowing my ascent from 15-0fsw to a snail's pace (good), is there an off-gassing advantage in the above end-of-dive profile? Would I be better off doing a normal ascent from 15fsw and sucking down the rest of the tank while sitting on the boat?
Happy diving!