Going through the FAR,
91.211 Supplemental Oxygen.
Part (b), Paragraph (1), Section (ii)
“No person may operate a civil aircraft of U.S Rigistry with a pressurized cabin at altitudes above flight level 350 unless one pilot at the controls is wearing and using an oxygen mask that is secured and sealed and that either suppllies oxygen at all times or automatically supplies oxygen whenever the cabin pressure altitude of the airplane exceeds 14,000 feet (MSL), except that the one pilot need not wear and use an oxygen mask while at or below flight level 410 if there are two pilots at the controls and each pilot has a quick donning type of oxygen mask that can be place on the face with one hand from the ready position within 5 seconds, supplying oxygen and properly secured and sealed.”
Does this apply to flying for the airlines? I’m asking because I never envisioned an airline pilot in the cockpit with a quick donning mask hanging off them. Thanks for any reply!