Do you know how to Manage Oxygen?
Hovering over a reef, camera in hand – you see that juvenile spotted drumfish that you’ve been chasing for the last half hour. Finally, he has come out into the open and is parked in front of this spectacular purple sponge and bright orange anemone. Your frame is set; lighting is good. Your underwater model is cooperating. “BEEP BEEP BEEP,” your computer is telling you that you’re entering a danger zone and are at risk for oxygen toxicity. It says your “PO2 is 1.4.”