I've been reading George's deco articles at http://www.wkpp.org/decompression.htm and some of his other stuff.

I sort of see what he's getting at with the repetitive diving, but my understanding is far from solid, and I was hoping to get some more info here to make things more concrete.

1. He has said that the bubbles can grow up to 4 hours after surfacing (before they start to contract), but that he clears of them in under 30min. I'd like to know what the 4 hour figure is based on? How long does it take for the bubbles to then dissapear? How big are they (diameter?) and do they all grow more or less uniformly?

2. George recommends a deeper second dive because of the bounce dive problem, and I see why no bounce diving makes sense, but I'm not clear on why that implies that a deeper second dive is better. Namely the problem, as I understood it, was the rapid ascent associated with the bounce dive when there were still bubbles all over the system. But would it be any safer to make a deep bounce dive - say deeper than the first dive, as opposed to a second shallow bounce dive. I mean, if the bubbles have grown sufficiently big on the surface then going sufficiently deep would make them small enough to slip through into the brain and spine anyway, so going up fast would seem just as bad as doing it from a shallow depth. What am I missing?