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Acoustic Early Warning
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Acoustic Early Warning
A British military sound locator in use at an airfield in southern England, 12th August 1930. The sound locator, a precursor to radar, was an acoustic early warning system, which used sound to determine the direction and elevation of enemy aircraft. On the left is a searchlight to be used in conjunction with the locator. (Photo by Hulton Archive/Getty Images)
Hulton Archive
Media ID 24327891
© 2009 Getty Images
British Military Equipment Headphones Medium Group Of People Only Men Radar Rural Soldier
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