15 Mar

File:Radar and Electronic Warfare 1939-1945 A31092.jpg

Add date of {{between|1939|1945}}
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Naval Radar: A High Frequency Direction Finding Mast, fitted on the foremast of a destroyer. Early in the war, German submarine wolfpacks made heavy use of radio communications. These were picked up by HF/DF sets and enabled Allied warships to establish the whereabouts of German submarines.}}

Naval Radar: A High Frequency Direction Finding Mast, fitted on the foremast of a destroyer. Early in the war, German submarine wolfpacks made heavy use of radio communications. These were picked up by HF/DF sets and enabled Allied warships to establish the whereabouts of German submarines.}}

|author = Royal Navy official photographer

|author = Royal Navy official photographer
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|date = (Second World War)
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|date = {{between|1939|1945}}

|source = http://media.iwm.org.uk/iwm/mediaLib//31/media-31247/large.jpg

|source = http://media.iwm.org.uk/iwm/mediaLib//31/media-31247/large.jpg

* Catalogue number [http://www.iwm.org.uk/collections/item/object/205187696 A 31092]

* Catalogue number [http://www.iwm.org.uk/collections/item/object/205187696 A 31092]

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