Michael Guerrero
Contributor
the complex solution is just get an O2 bottle and take an AN/DP class, that way worst thing you're doing is fighting a bit of more narc at depth, but you can just deco.
I always get air fills and take an O2 bottle with me if it's local stuff, and then will just top off with nitrox in cave country as I go, same on the coast.
Same here. 170' or less I dive air w/ an AL40 of O2. Maybe some 50% too if I'm going to be down there a while.
---------- Post added November 20th, 2014 at 10:59 PM ----------
and my bladder full enough
Pee valves are a wonderful thing. I recommend the unbalanced kind