What does CQD mean in Amateur Radio?
This page is about the meanings of the acronym/abbreviation/shorthand CQD in the Academic & Science field in general and in the Amateur Radio terminology in particular.
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What does CQD mean?
- CQD, transmitted in Morse code as – · – · – – · – – · · is one of the first distress signals adopted for radio use. It was announced on 7 January 1904, by "Circular 57" of the Marconi International Marine Communication Company, and became effective, beginning 1 February 1904 for Marconi installations. Land telegraphs had traditionally used "CQ" to identify alert or precautionary messages of interest to all stations along a telegraph line, and CQ had also been adopted as a "general call" for maritime radio use. However, in landline usage there was no general emergency signal, so the Marconi company added a "D" to CQ in order to create its distress call. Thus, "CQD" is understood by wireless operators to mean, "All stations: distress." Contrary to popular belief, CQD does not stand for "Come Quick, Danger", "Come Quickly: Distress", or "Come Quick—Drowning!"; these are backronyms. Although used worldwide by Marconi operators, CQD was never adopted as an international standard since it could be mistaken for a general call "CQ" if the reception was poor. At the second International Radiotelegraphic Convention, held in Berlin in 1906, Germany's Notzeichen distress signal of three-dots/three-dashes/three-dots was adopted as the international Morse code distress signal.
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CQD also stands for:
- Center for Quantum Devices
- Ciudades Que Danzan
- Close Quarter Defense
- Close Quarters Defense
- Close Quarters Drill
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