Amateur radio history

first artificial Earth satellite

late January-early February 1953 North sea flood storm

over the horizon early warning radar

CQD (transmitted in Morse code as ) is one of the first distress signals adopted for radio use. On 7 January 1904 the Marconi International Marine Communication Company issued "Circular 57", which specified that, for the company's installations, beginning 1 February 1904 "the call to be given by ships in distress or in any way requiring assistance shall be 'C Q D.

aspect of history

a clandestine and underground radio station