Editing Equivalent air depth (section)

==Calculations in metres==
The equivalent air depth can be calculated for depths in metres as follows:

:EAD = (Depth + 10) &times; (Fraction of N<sub>2</sub> / 0.79) &minus; 10

Working the earlier example, for a nitrox mix containing 64% nitrogen (EAN36) being used at 27 metres, the EAD is:

:EAD = (27 + 10) &times; (0.64 / 0.79) &minus; 10

:EAD = 37 &times; 0.81 &minus; 10

:EAD = 30 &minus; 10

:EAD = 20 metres

So at 27 metres on this mix, the diver would calculate their decompression requirements as if on air at 20 metres.