With loss of cabin pressurization at altitude, pressure breathing of 100% oxygen at high airway pres- sures enables the pilot's alveolar PO2 to be maintained at a safe level during emergency descent.
People Also Ask
Even though smoking has been illegal for 30-plus years, the Federal Aviation Administration (FAA) still has a written rule on the books to correct for continued bad behavior.
Sure, everyone knows that you have to use supplemental oxygen if you fly more than 30 minutes at cabin pressure altitudes of 12,500 feet or higher. And that at cabin altitudes above 14,000 feet pilots must use oxygen at all times.