huff-duffn.
/ˈhʌfdʌf/ A device for determining the direction of incoming high-frequency radio signals, enabling their source to be located when bearings are obtained by two or more such devices.
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huff-duff1946
1946 N.Y. Herald-Tribune 16 Jan. 22/1 ‘Huff duff’, with a range that makes it possible to detect and plot radio signals of as little as fifteen seconds' duration emitted halfway around the globe from plotting stations.
1955 ‘C. S. Forester’ Good Shepherd ii. 39 Huff-Duff reports foreign transmission.
1962 L. Farago Tenth Fleet viii. 162 They used decoy subs to befuddle the Huffduff.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018).
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