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EAMs & radio traffic at 8992 and 4724 kHz from call sign “Overlord”
December 10, 2017
EAMs at 8992 and 4724 kHz from call sign "Overlord" What you are hearing is known as an Emergency Action Message (EAM). These transmissions are part of the High Frequency Global Communications System (HF-GCS) run by the United States military as a way ...
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