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You could try to find an online planner for air then use something like the DSAT cards for EAN. They have tables for converting EANx to air equivalents. e.g. 80fsw on EAN36 is equivalent to 59fsw on air (EAN21). You can then plan the nitrogen loading using an air planner. You'll also have to calculate the O2pp as well.
I'd still do the EAN36. If the MOD is 80' then you can go to EAN40 but (a) what if you go a little deeper by accident or have to go deep to save your buddy and (b) I'd worry more about an oxygen toxicity than nitrogen loading.
An exposure to an increased ppO2, of 2.0 or even 3.0 for the time it would take to accomplish a rescue would not concern me in the least, and frankly is should not worry you. It a function of time AND depth, not depth alone.
An exposure to an increased ppO2, of 2.0 or even 3.0 for the time it would take to accomplish a rescue would not concern me in the least, and frankly is should not worry you. It a function of time AND depth, not depth alone.
I find the initial post troubling. Perhaps the OP should consult the instructional materials from his nitrox class. The answer should be clear. AceszHigh, when you get the chance, please let us know which tables you are using.
OK so I have to own up and admit I'm the a** here. They are SSI nitrox tables, and I had not used them since my cert class (the most dives I have done in one day up to this point was two and I know the tables by memory for those profiles)..I wasn't looking at the table when I wrote this. I just remembered my cert class and only reviewing the tables for a max of 3 dives in a day.
I've since pulled out the tables and relearned them, and know better now. According to the tables I wouldn't really be able to do the 4th dive. But the tables are based on square profiles, I did exaggerate the max depths a bit to be on the safer side, and I will be using a computer.
You could try to find an online planner for air then use something like the DSAT cards for EAN. They have tables for converting EANx to air equivalents. e.g. 80fsw on EAN36 is equivalent to 59fsw on air (EAN21). You can then plan the nitrogen loading using an air planner. You'll also have to calculate the O2pp as well.
I'd still do the EAN36. If the MOD is 80' then you can go to EAN40 but (a) what if you go a little deeper by accident or have to go deep to save your buddy and (b) I'd worry more about an oxygen toxicity than nitrogen loading.
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