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Jan 26th 2013 5:00PM Oops! I transposed depth numbers in last post.
55 meters = 180 feet. Yes. 130 or 140 is usually advised, but I just Googled "rebreather 600 feet" and did find a couple of forums on the extreme depth subject. One quote: "divable to at least 100m (330 ft) straight out of the box" and then some talk about changes of the orifices getting down to 600+ft. I assume larger. Gas must get pretty syrupy at those depths.