Quote: (Originally Posted by
JeffG)

There is no magic behind Ratio Deco. It is easy to come up with a "ratio deco" for air deco dives (I think Scuba_Steve on SB called this TDIing it)
Yes. Someone asked me to come up with a set of rules for air / 50% that mimic 20/80 GFs. Ish.
Deco on the Pie (DOTP) - YD Dive Forums & Scuba Community
Janos