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High Frequency direction finding
- this page is a stub
HF/DF, commonly known as huff-duff, is the abbreviation of High Frequency
Direction Finding, and refers to a system, developed in the UK
during WWII,
to quickly and accurately determine the position of enemy ships –
especially during the Battle of the Atlantic – where it contributed to
an estimated 24% of all U-boats sunk [2].
The system is based on a 1926 development by Robert Watson-Watt,
and was further developed by the French engineer Henri Busignies
prior to WWII.
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This page is a stub
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This page currently acts as a placeholder for current and future information
about HF/DF and the FH4 receiver. For a detailed description of the FH4 and
its operation during WWII, we highly recommend visiting
Arthur Bauer's website [3].
Also highly recommended is Arthur's book
Funkpeilung als alliierte Waffe gegen deutsche U-Boote 1939-1945
(in German language), in which he gives a detailed account on how HF/DF
was used against the German U-boats during WWII. It also describes the
FH4 receiver and the special direction finding antenna that was used with it.
This book is no longer in print, but can now be downloaded from Arthur's
website [4].
The image on the right shows the famous British FH4 HF/DF device, as it
is on display on the HMS Belfast boat museum in the UK [2].
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© Crypto Museum. Created: Saturday 17 December 2016. Last changed: Tuesday, 30 July 2024 - 05:29 CET.
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![Photograph by Rémi Kaupp - via Wikipedia [2]](img/FH4_HMSBelfast.jpg)