🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسیहिन्दी한국어中文日本語EntityQ1367488· pop 23· linked from 1,120 articlesradio direction findingAlso known as direction finding, DF, RDFmeasurement of the direction from which a received signal was transmittedAvailable in 23 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsالعربيةCatalanCroatianDanishConnectionsWorld War IIConcepthertzEntityCategoriesAircraft instrumentsAir navigationAmerican inventionsAutomatic identification and data captureAvionicsGeopositioningItalian inventionsNavigational aidsRadio direction findingRadio-frequency identificationRadio navigation