bn:01318756n
Noun Named Entity
Categories: Secret broadcasting, Military radio systems, Numbers stations
EN
letter beacon  cluster beacon  cluster beacons  FSK marker  Fsk markers
EN
Letter beacons are radio transmissions of uncertain origin and unknown purpose, consisting of only a single repeating Morse code letter. Wikipedia
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EN
Letter beacons are radio transmissions of uncertain origin and unknown purpose, consisting of only a single repeating Morse code letter. Wikipedia
Radio transmissions consisting of only a single repeating Morse code letter Wikidata
IS A