I was researching information about the French Navy in 1700 and came across this little gem on Wikiwand about how to properly address a French Naval Officer:
Unlike in the French Army and air force, one does not prepend mon to the name of the rank when addressing an officer (that is, not mon capitaine, but simply capitaine). Addressing a French Navy lieutenant de vaisseau (for instance) with a "mon capitaine" will attract the traditional answer "Dans la Marine il y a Mon Dieu et mon cul, pas mon capitaine!" ("In the Navy there are My God and my arse, no 'my captain'!").