[ huhf-duhf ]
/ ˈhʌfˌdʌf /
a method used by the Allies in World War II for locating enemy submarines and other naval or land targets through simultaneous bearings on their radio transmissions.
Origin of Huff-Duff
vocalization of the abbreviation h.f.d.f. for high-frequency direction finder
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019