An earlier version of this article appeared in the Northern Observer, a Canadian newsletter for VLF experimenters, Issue 22, Nov. 1990. THE LAST RADIO NETWORK Long Waves from the Cold War by Bennett
Andre Kesteloot quoted KC5CW: Other systems exist. The CONELRAD (CONtrol of ELectromagnetic RADiation) procedure of the 1960s required radio stations to broadcast special announcements, turn on and o