Now THAT is really the point, I would think. If you're at 84' and you know both how much air you & your buddy have at any point in time, and you know how much air it would take to get either of you home on the other's gas, the chances of you being separated beyond reach is about zero. We're talking rec diving here, so we're talking one tank, and both divers have made a plan which includes a dive to 84' or more, and a rock bottom and both are tracking these things during the dive.jonnythan:Does your buddy have enough air to get both of you up from 84 feet? Do either of you have *any* idea how much air it will take? What do you do when you're at 25 feet and suddenly both OOA?
The only other way is, you just jump in and start diving, no one knows where they're going or what the turn pressure is and they're not communicating during the dive and diver A is way over here and diver B is way over there and diver A runs out of air and says, gee, where's my buddy? Wow, he's way over there. Hummm, maybe I should just head for the sky.
Also, many people have said something like, well, just don't dive with that bad buddy. Wait a minute. Why are YOU 30' away from your buddy who might need your assistance? As someone said, it really takes TWO bad buddies for this to happen. Even one good buddy will stay with (and communicate with) the other. If I dive with someone I can't manage to stay close to, I will call the dive. Period. Parameters are established at the beginning of the dive. You signal, slow down, or the two parallel fingers meaning side-by-side. If the buddy doesn't comply, you don't head down to 85'.
Oh yeah. But if it does happen, my suggestion is to head for the surface. With buddies like this, who knows what kind of mess will result from trying to actually perform a basic skill like sharing air. Might result in two dead.
I have been guilty of being the bad buddy in the past, and the better diver had NO qualms will setting me straight. Now (hopefully) I am a better diver for it.