While making my way through Ladislas Farago's "The Tenth Fleet", I have been truly fascinated by the ingenuity of great minds in the 1940's as well as the valor exhibited by the commercial vessels that transited the Atlantic.
One technical topic that has pages, rightfully from its importance, dedicated to it, is a product of the former mentioned above: Huff-duff, or HF-DF, or High Frequency Direction Finding. This technology was brought to relevancy through precision by the Allies after the U-Boat Command dismissed inaccuracies at the beginning of the war as "no cause for anxiety"1, leading to terrible COMSEC procedures which ultimately led to defeat.
