How to address Flight Deck

[flapsforty]

Strictly first name with us from the first handshake, but we use "Captain" and "Purser" when addressing either in front of the passengers.
Never heard anyone even discuss this in our outfit, it's just the way things evolved I guess.

Captain always referred to as "The Boss" by other pilots, FAs and ground staff but never addressed as such. It's a term of endearment.