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First Officer (disambiguation)
First officer
First officer
may refer to:
Transportation
Chief mate
, the second-in-command (usually) of a merchant ship
First officer (aviation)
or "co-pilot", the second-in-command of a civil aircraft
Military
Executive officer (military)
, the second-in-command of a naval vessel
First officer, the most senior civil service position in the
United States Foreign Service
First officer, a rank in the
Air Transport Auxiliary
corresponding to flight lieutenant in the Royal Air Force
First officer, a rank in the
Women's Royal Naval Service
corresponding to lieutenant-commander in the Royal Navy