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I have to add the caveat that I would never (currently) clock up 30 mins deco (or any, deliberately) BUT I would take them to the surface. It would be as slow an ascent as I assessed was achievable but there is no way i would send them to the surface unattended. What if they lost their reg on the way? If they are unconscious and floating face down on the surface those seconds for the rib to arrive could be the end for them. You are also submitting an already compromised diver to an uncontrolled, accelerating ascent which is likely to add to their troubles still further.
Keeping a diver down to complete deco is too risky. You could be just delaying the inevitable (that you have to get him to the surface), you could be killing them (by delaying necessary treatment) and all for the sake of risking a bend, which is treatable.
As for going back down....isn't that, in effect, in-water recompression? Why bother, if you have O2 on board and one of you is heading for the chamber anyway?
Another interesting dilemma. Will be good to see the range of views!  |