And of course, what would something like this be without a little controversy?
Commentary on social media is that in photos shared, passengers were wearing their oxygen masks incorrectly, i.e. just over their mouths instead of over their noses and mouths; hadn't they listened to the safety drill, they say, etc.
https://www.rt.com/usa/424469-southwest-oxygen-masks-incorrect/
In fairness, those cup shaped masks, for people not used to using oxygen masks, aren't shaped too well to go over both; instinctively it probably seems like they're meant to just go over mouths.
Big deal? Probably not. But I was reading something the other night (in relation to the peanut thread
) which I hadn't seen before as to how, exactly, our bodies are affected by pressures and altitudes in a plane, which helps explain WHY it makes sense to have an oxygen mask go over both mouth and nose, since the nose is generally primarily how someone is breathing.
(Feel free to skip over this part if you're not into physiological details!)
"Alterations in passenger cabin during flight: implications of physiological changes during air travel
There are two major concerns about allergic and respiratory diseases when traveling by air. The first is related to the concentration of oxygen in the cabin. While in flight, the cabin pressure is equivalent to an altitude of 6000 to 8000 ft, exposing passengers to a partial pressure of arterial oxygen of 60 mm Hg compared to 75 to 100 mm Hg at sea level. Thus, the partial pressure of oxygen in the cabin air at cruising altitude is 25–30% lower than at sea level. A slight fall in oxygen blood saturation occurs, ranging from 92 to 95%, followed by compensatory hyperventilation and tachycardia [9]. These physical alterations may affect passengers who have cardiac, respiratory or hematologic (anemia) diseases, theoretically increasing the risk of exacerbations of allergic and hypersensitivity reactions such as anaphylaxis."
So in effect, it could actually help people stay calm in an emergency to wear their mask correctly.