Insignia Title Flight Lieutenant Flying Officer Pilot Officer Officer Cadet Abbreviation FLTLT FLGOFF PLTOFF OFFCDT ADF Code O-3 O-2 O-1 NATO Code OF-2 OF-1 OF-1 Army Equivalent Captain Lieutenant Second Lieutenant Staff Cadet (RMC) Officer Cadet (ADFA) Navy Equivalent Lieutenant Sub Lieutenant Acting Sub Lieutenant Midshipman