Routine two tank (AL80) drift dives in Jupiter / West Palm on air would be limited on NDL for both dives. On Nitrox 32 site dependent. On Nitrox 36 and HP100s not likely but site dependent.
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If you are using tables, then the depth you enter is the max depth on the dive, not the average. So you should have entered 90 ft. You get a much shorter NDL that way, because the assumption in the tables is that you spent all your time at 90 ft. You didn't, but your tables won't help you; they don't know how to deal with average depth. That is why you have a computer. There is often confusion on this, because air consumption is linear with time and depth, so you can use an average depth without any issues. But nitrogen uptake and off-gassing -- which is what your NDL is all about, is NOT linear with either depth or time, so you can't use averages.I used the dive planner app which is based on PADI tables to come to some estimation of ndl under air and nitrox for a deep dive with an actual average depth provided by my dive computer. How else would you recommend I make the comparison?
A Shearwater in tech mode on 50/80 will put you into deco faster than just about everything else on a first dive. When it does that, it will want you to do a 1 minute decompression stop. By the time you get all the way to the point that it wants you to do a 3 minute stop (like everyone else's safety stop) you are at a more comparable bottom time. (BTW, that is how I usually dive myself, so I am very familiar with it.)This was with my Shearwater @ 50/80 on air.
Avg depth is good for gas consumption, not for nitrogen exposure. You must use the real profile for nitrogen exposure.I used the dive planner app which is based on PADI tables to come to some estimation of ndl under air and nitrox for a deep dive with an actual average depth provided by my dive computer. How else would you recommend I make the comparison?
There is often confusion on this, because air consumption is linear with time and depth, so you can use an average depth without any issues. But nitrogen uptake and off-gassing -- which is what your NDL is all about, is NOT linear with either depth or time, so you can't use averages.
Avg depth is good for gas consumption, not for nitrogen exposure. You must use the real profile for nitrogen exposure.
I don't use subsurface; can't help.Thanks for setting me straight on this. I have my profiles stored in Subsurface. Is there a way to use those profiles to compute nitrogen exposure for air vs. EAN?