Two questions

[JeffG]

Oh you're so bad

Its good to be bad.

 

[daniel f aleman]

Even though you may have 100% access to EANx, it's always good to know your depth/time abilities while diving air at any given time... millions of divers dive safely on air every day.

 

[amascuba]

Even though you may have 100% access to EANx, it's always good to know your depth/time abilities while diving air at any given time... millions of divers dive safely on air every day.

It's more of a question of how deep is acceptable to dive on air? People have dove hundreds of feet on air, but does being so inebriated because of the pn2 make it the wisest choice of gas? If nitrogen wasn't so narcotic people would probably use air for everything and not even worry about mixing gases together that are a combination of less narcotic and provide a decent deco schedule. That is up until you hit your po2 for your given depth.

 

[PvilleStang]

Well, I guess I jumped on this one late, but I just gotta give my two cents here. I took my Adv. Nitrox and Deco course with a local instructor I knew well. My big thing in diving is not necessarily doing what the instructor tells me to because he tells me to, but figuring out the practicality behind it. Unfortunately, a lot of the things he did came about because someone told him to do it that way, and he couldn't produce answers for them. When diving with a Instructor Trainer during my own time, while he was training an instructor, I had the opportunity to learn from him and take on some new skills that were more practical (for instance, switching over to back gas). His way was measurably quicker, and not any more risky than the way my instructor taught me, but still couldn't use it in my instructor's realm of diving.

Basically, what I'm getting at here, dive with an instructor or two on a simulated deco, watch what he does, and ask him why he does it. If he doesn't sound competent, then you might want to shop around a bit.