Aircraft by Nation

United States
Navy/Marine Corps (1923 - 1962)

Observation: The first Navy observation aircraft were used as spotters for the battleships guns.  By World War II, this role had been taken over by "OS" and "SO" (Observation Scout and Scout Observation) aircraft.  The "O" for Observation designation was used by the U.S. Marines for what the U.S. Army would call "Liaison" aircraft.

Return to U.S. Navy/Marine Corps (1923 - 1962)