Wow, I'm glad I asked.
That's some scary diving those guys do ... never has using a CCR sounded so sane. 
Those hookah rigs ...  ... and intresting deco procedures ... must be the Really Giant Bubbles Model they're using ... how do you calculate for polycarbons? 
Thanks for the trip report. 
__________________
Cheers
Stefan
"Political Correctness is a doctrine, fostered by a delusional, illogical minority,
and rabidly promoted by an unscrupulous mainstream media,
which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"
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