Abbot's Cliff Acoustic mirror, between Folkestone and Dover, a precursor to radar was uses as a listening device for detecting Zeppelin's and planes in WW1. | Quintin Lake Photography
Duke of York - Radar Towers
Chain Home Radar Station near Dover from the air | aerial photographs of Great Britain by Jonathan C.K. Webb
Radar System
Dover Anti-Aircraft & Radar (c. 1939) | Dover's History Archive on Dover .UK.com