Quote: (Originally Posted by
Lancer4545)
Is there something I am missing here or is someone blazing a new (and dangerous) trail?
Regards,
Lance
ADDED Please, Please......Lets not turn this into a bashing place and lets keep it on subject!!
Heliox vs Trimix on Constant Set Point CCR diving is much less of a problem than when you compare Heliox vs Trimix on OC. While I would not run a schedule like the one you describe here switching to a 1.6 atm PO2 at 6 meters it's a sure way of not getting bent. It's old school approach to decompression. (if using Buhlmann) Ascend to 45 msw (expand bubbles) do some decompression then at 6 msw treat with oxygen. Since we know this is agressive if they shaved it all down to 200 min total run time they were probably fine.
Here is a link to a PDF where I make the comparison of
10/90 heliox 1.3 set point Hamilton Kenyon Bubble Model HKBM
16/45 trimix 1.3 set point Hamilton Kenyon Bubble Model HKBM
10/90 heliox 1.3 set point / 100% oxygen Buhlmann (raw)
http://www.nitroxdiver.com/Training/...le-compare.pdf
It's pretty clear that using a bubble model for this helps keep the CNS down, and gives a nice clean decompression. The differences between the heliox and the trimix decompression on the bubble model are reasonable.
Profiles generated with NAUTILUS DIVE PLANNER
Cheers