The distress signal CQD originated from the signal CQ, expressing "seeking you," or "all stations." The signal CQ was commonly used among wireless operators -- and land-based telegraphers before them ...
The RMS Titanic leaves Belfast, 1912. * Photo: Courtesy of U.S. National Archives and Records Administration * 1904: "CQD" is adopted as the international distress signal for the operators of Marconi ...
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