“…This is because a non-verbal message can be a regulator, which is used to control, maintain or discourage interaction [55], for example, by holding up a hand to discourage communication. There is also a common preference for face-to-face communication among pilots, perhaps instilled from traditional training methods, as demonstrated in a study that examined crew interaction on physically separated pilots [56]. They observed some confusion from pilots not being able to point or exchange paper (e.g., charts), although, most importantly, this did not appear to interfere with the quality of decision making.…”