C Q D
Source: 567
C Q D. In radiotelegraphy, the letters signified by the code call formerly used (cf. S O S) by ships in distress, formed by combining the code call C Q (formerly used as a general call for all stations) with D for distress.
Source: 567
C Q D. In radiotelegraphy, the letters signified by the code call formerly used (cf. S O S) by ships in distress, formed by combining the code call C Q (formerly used as a general call for all stations) with D for distress.