[sciencemike]

I do see what you are saying. Let me see if i can summarize it.

When going from -10 meters to 0m, the volume of air in your lungs will double. So, if your reference point is -10 meters and you take that to be 100%(volume), then when you surface your lung volume percentage is now 200% of what it was.

That is true, and i like that for lung volume. Now if you look at the pressure, which is a different story. I will cut and paste but replace with pressures.

When going from -10 meters to 0m, the volume of air in your lungs will double. So, if your reference point is -10 meters and you take that to be 100% (Pressure), then when you surface your lung pressure percentage is now 50% of what it was.

Thank you. It does make it more understated to use pressure. I probably shouldn't say this but there are parts of Henry's law that i haven't worked out fully in my head. I would like to actual numbers put into the equations, ill do some searches on DB. Im sure Trux will have some java script calculator or reference article i can find.