| I'm not sure that this is the best option either, i think wait a little while, save up for what you need to set up your double 80's, it's a lot nicer in the water than a single and a stage.
But it doesn't seem like for these types of dives there is a problem with redundancy and not having enough gas. According to the way the original poster laid out his possible dive profile, he would always have a full "rock bottom" in both of his tanks, so even if one was rendered useless, he would have the other. So lets say minimum gas in an al80 at 100 feet is 1500 psi, then when the stage gets to 1500 psi, he switches to the back tanks, when that gets to 1500 he comes up. To me it seems like anywhere along the way if he has an issue with either of his tanks, he's got enough to get out safely. These are just dives within minimum deco limits.
So the planning sounds kosher, but it's not DIR, and more importantly or maybe the same, there are better ways to skin this cat. Doubles. |