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Knock John Fort

Built: 1942

Formerly a British Navy Fort (U4) constructed to protect coastal sea lanes during World War 2

Other offshore radio use:-

Also housed Radio Essex


Knock John Fort is located in the Thames Estuary, 8.5 nautical miles off Foulness, Essex and 12 nautical miles off Herne Bay, Kent

51.33.72 North 1.09.83 East


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Fort and Location

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Knock John Fort

Ships and Sea Structures