| 11. | It served only small observation aircraft at that time.
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| 12. | It was equipped with BC-1 and O-46 observation aircraft.
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| 13. | There, the 12th began to receive the latest in French observation aircraft, the Salmson 2A2.
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| 14. | We have lost contact with our unmanned observation aircraft,
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| 15. | One of the Navy aircraft was modified as an observation aircraft and redesignated "'EO-1 " '.
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| 16. | The Ravens flew the entire gamut of U . S . observation aircraft, from air strikes.
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| 17. | It was what observation aircraft was all about.
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| 18. | Pursuit planes protected observation aircraft during these missions.
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| 19. | The French began the war with several squadrons of Bl�riot observation aircraft equipped with cameras for reconnaissance.
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| 20. | The German defences on the north slope, were bombarded under the direction of French artillery-observation aircraft observers.
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