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Yeah I was kind of thinking the same I was thinking that while I really wanted to go deeper into the cave the realistic possiblity never crossed my mind b/c I was not going to leave the cavern zone without the propper training. Back gas had nothing to do with my decision the understanding of how serious the cave is and mindset to play by rules in those enviroments made my decsision.Dive-aholic:However, if you need the air limitations to keep you from exploring beyond your training level, then you shouldn't be in a cavern or a cave, even with a single tank. If that were the only thing to keep you back, just get a 120, fill it to 3600 and you'll have plenty to go explore.
