Technology: Aerospace: Aeronautics: History: Early warning sound mirrors

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Submitted: Sat Sep 06 2003
Title: Early warning sound mirrors
URL: http://www.ajg41.clara.co.uk/mirrors/
CT: Technology: Aerospace: Aeronautics: History: Early warning sound mirrors

Description: Andrew Grantham provides photographs and details of surviving early 20th-century acoustic mirrors on the British coast designed to provide early warning of enemy aircraft.

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