CQD
Morse code distress call in the early 20th century / From Wikipedia, the free encyclopedia
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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' ".[1]
For other uses, see CQD (disambiguation).
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