seanmclemore

well i guess i'll give my $.02 since i was mentioned at the beginning of this post.

you guys/gals can keep arguing the pros/cons of nitrox vs air till the cows come home,

AIR IS NITROX

21% to be exact

all you are arguing is the safety factor and pushing the pp02 limits. one of the first thing you learn in training (or should be depending on who's teaching) is that you plan you mix based on you planned depth. now, as you advance in training and start to dumb things like touch the sand...you plan your mix for the max you could hit in a given situation...which at the "O" is a different situation because then everyone would be diving air.

anyhow, back to the point, when spearfishing something like the tennaco rig, most people will take a mix for 170' because likely they will not go to the bottom and dig a 10' hole and sit in it for an hour.

now draw your own preferences as to richer mixes, yes it makes you feel better after diving, yes it doesn't give the dry mouth, and yes if done properly IT IS SAFER

cheers