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Tables and Charts
Tables and Charts
Absolute Pressure at Depth
Depth
Depth
(fsw)
(msw)
Pressure
(ata)
0 0 1
10 3 1.3
20 6 1.6
30 9 1.9
40 12 1.2
50 15 2.5
60 18 2.8
70 21 3.1
80 24 3.4
90 27 3.7
100 30 4.0
110 34 4.4
120 37 4.7
130 40 5.0
140 43 5.3
150 46 5.6
THIS TABLE CAN BE USED TO CONVERT EITHER
FROM DEPTH TO ABSOLUTE PRESSURE OR ABSOLUTE PRESSURE TO
EQUIVALENT DEPTH.
Oxygen Partial Pressure (in atmospheres absolute) at Depth
FO2 Air 0.24 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40
Depth
(fsw)
Depth
(msw)
40 12 0.46 0.53 0.58 0.62 0.66 0.71 0.75 0.80 0.84 0.88
50 15 0.53 0.60 0.65 0.70 0.75 0.80 0.86 0.91 0.96 1.01
60 18 0.59 0.68 0.73 0.79 0.85 0.90 0.96 1.01 1.07 1.13
70 21 0.66 0.75 0.81 0.87 0.94 1.00 1.06 1.12 1.19 1.25
80 24 0.72 0.82 0.89 0.96 1.03 1.10 1.16 1.23 1.30 1.37
90 27 0.78 0.89 0.97 1.04 1.12 1.19 1.27 1.34 1.42 1.49
100 30 0.85 0.97 1.05 1.13 1.21 1.29 1.37 1.45 1.53 1.61
110 33 0.91 1.04 1.13 1.21 1.30 1.39 1.47 1.56 1.64 1.73
120 36 0.97 1.11 1.21 1.30 1.39 1.48 1.58 1.66 1.76 1.85
130 40 1.19 1.28 1.38 1.48 1.58 1.68 1.77 1.88 1.98
OXYGEN PARTIAL PRESSURE AT DEPTH FOR VARIOUS NITROX BLENDS–MODERATE SHADING INDICATES AN OXYGEN PARTIAL
PRESSURE BETWEEN 1.4 AND 1.6 ATA. DARK SHADING INDICATES OXYGEN PARTIAL PRESSURE IN EXCESS OF 1.6 ATA.