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A clean-shaven face may not be necessary for pilots to ensure safety during in-flight emergencies, according to scientists who found that those who sport a full beard can also properly seal on an oxygen mask. Several airlines require pilots to have a clean-shaven face as it is believed to be necessary to ensure a proper seal on an oral-nasal face mask during an emergency scenario. Scientists from the Simon Fraser University in Canada conducted a study to determine the efficacy of face masks on different beard lengths. They wanted to understand if present-day equipment delivers sufficient oxygen to protect a bearded pilot from hypoxia during an emergency scenario. Based on the findings, Air Canada changed its policy for aircrew and now permits a maximum beard length of 1.25 cm.
Source : https://www.thehindu.com/todays-paper/tp-life/safe-for-pilots-to-sport-beard-says-study/article25032804.ece
