One of our North Atlantic Barons - the early Captains who were ex WWII bomber pilots - sternly admonished me when as a lowly S/O - Nav. on a Stratocruiser I attracted the co-pilots attention by calling him by his Christian name - We DO NOT use christian names on the flight deck MR XXXXXXXX said the Captain. When eventually gaining command myself, I would introduce myself to the crew by saying that I didn't have a Knighthood, my name was ( Christian name ) and point out that if they were uncomfortable with that, then whilst on duty I was indeed "Captain" but in the bar that night I was ( Christian name )
A psychiatrist died and upon reaching the Pearly Gates St.Peter welcomed him with the words " I'm glad you've come, we're having a little trouble wit God, he thinks he's a BOAC Captain."