Both you and Phil are using RT... that must mean that you have to keep track of RT... do you have the RT for each stop written down on a slate or something?MikeFerrara once bubbled...
I go by decompression run time.
We just remember the stops with more than 1 minute.
For example last week we did 160' for 20 minutes:
Our first one minute stop was at 100' and everything else was one minute (except the gas switch at 70' is three minutes) until we get to the first multi-minute deco stop which happened to be at 40' for 2 minutes, 30' for 3 minutes, 20' for 6 minutes, 10' for 4 minutes (we switch the 10' and 20' stops.)
Thus we call a 160/20 using EAN50 for deco a 2,3,6,4 dive... and that is all we have to remember. First stop and all but the gas switch (always 3~5) are one minute... then we do 2,3,6,4
We do have 2,3,6,4 written down in our wetnotes but this is so simple to remember even I can do it.