In military circles, address a midshipman as “Mr. or Ms. (or Miss) .” When with civilians, introduce the midshipman as “Midshipman ” and address the midshipman as “Mr. or Ms. (or Miss)
Thanks. I think I've seen one in all the time i've been at cadets, and he was a proper navy midshipman (on a Royal Fleet Auxillary ship I stayed on), but I never had to talk to him and never saw anyone address him either.