Catalogue description The interception of German Teleprinter Communications at Foreign Office Station...

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Details of HW 50/79
Reference: HW 50/79
Description:

The interception of German Teleprinter Communications at Foreign Office Station Knockholt. A description by Kenworthy, who was GC&CS's main technical officer for interception of new radio transmissions, dealing with the interception of German encyphered teleprinter transmissions (covername FISH). Different systems were given fish names (TUNNY was the main system intercepted). Individual links were also given fish names. 'Foreign Office' intercept stations were directly subordinate to GC&CS Service stations were subordinate to the War Office, Admiralty and Air Ministry
Date: 1926 Jan 01 - 1945 May 31
Held by: The National Archives, Kew
Legal status: Public Record(s)
Closure status: Open Document, Open Description
Access conditions: Retained Until 2004
Record opening date: 29 July 2004

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