5 - 39 90 0 95 100 105 110 115 120 125 130 135 20 40 60 80 100 Ground elapsed time, hr Figure 5-14 Descent oxygen tank quantities as a function of mission time Onboard readout, percent Unusables 0 10 20 30 40 48 Usable remaining oxygen, lb/tank Loss due to system leakage { }Dispersion
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