In 1935 Watt was asked to comment on reports of a German death ray based on radio. It is estimated that huff-duff was used in about a quarter of all attacks on U-boats. Huff-duff allowed operators to determine the location of an enemy radio in seconds and it became a major part of the network of systems that helped defeat the threat of German U-boats during World War II. Although well publicized at the time, the system's enormous military potential was not developed until the late 1930s. This led to the 1920s development of a system later known as high-frequency direction finding (HFDF or "huff-duff"). ![]() Watt began his career in radio physics with a job at the Met Office, where he began looking for accurate ways to track thunderstorms using the radio signals given off by lightning. ![]() ![]() Sir Robert Alexander Watson Watt KCB FRS FRAeS (13 April 1892 – 5 December 1973) was a British pioneer of radio direction finding and radar technology.
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