Yes I was surprised by the use of Sir quite often. I wonder what they call the female Pilots, ma’am?
I think I heard a ‘Ma’am’ in at least one video. Not sure if the lady was a pilot or ATC.
(Of course, Barbara Boxer would be highly offended. I personally felt pretty proud and special when I reached the status where men - and younger people - addressed me as ‘Ma’am.’)
More fun with Air Traffic Control - not real this time, but hilarious, and reminds me of the saying about “two countries divided by a common language.”:
https://www.youtube.com/watch?v=UGRcJQ9tMbY