Soldiers Pvt. Paul S. Bear and Sgt. Donovan of the Aero Division operating a radio direction finder (Goniometer) located at the gunlift. This device is used to locate targets or objects to be fired at, and is essential for spotting objects on land or sea even if the airplane is out of sight. Taken on April 24, 1919.

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Size: 8493px × 5800px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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