▚ THE OXYGEN-LIMIT NUMBER ▚
ppO2
Partial pressure of oxygen: the oxygen fraction times ambient pressure in ATA. Recreational nitrox planning typically limits it to 1.4 (working) with 1.6 as a contingency ceiling — the numbers behind every MOD table. Computers with nitrox modes display it live.
▚ TRAINING NOTEDive within your training and certification. This is gear research, not dive instruction, and not a substitute for training from a certified instructor. Service intervals and no-fly figures cited on this site are illustrative — follow your manufacturer’s manual and your agency’s / DAN’s guidance.