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By the 1970s, the Post Office Handbook for Radio Operators listed over a hundred Q-codes, [4] covering a wide range of subjects including radio procedures, meteorology, radio direction finding, and search and rescue. Some Q-codes are also used in aviation, in particular QNE, QNH and QFE, referring to certain altimeter settings.
ACP-131 [1] is the controlling publication for the listing of Q codes and Z codes. It is published and revised from time to time by the Combined Communications Electronics Board (CCEB) countries: Australia, New Zealand, Canada, United Kingdom, and United States.
Operating signals are a type of brevity code used in operational communication among radio and telegraph operators. For example: Prosigns for Morse code; 92 Code: telegraph brevity codes; Q code: initially developed for commercial radiotelegraph communication and adopted by other radio services; QN Signals: published by the ARRL and used in ...
In radiotelegraph operation, a Q code is often shorter, [39] and provides codes standardized by meaning in all languages – essential for international shortwave radio communications. Z codes are used for military radio communications NATO countries, and like Q codes are standardized across languages.
The QSA code and QRK code are interrelated and complementary signal reporting codes for use in wireless telegraphy . They replaced the earlier QSJ code. They replaced the earlier QSJ code. Currently, the QSA and QRK codes are officially defined in the ITU Radio Regulations 1990, Appendix 13: Miscellaneous Abbreviations and Signals to Be Used in ...
Q code, initially developed for commercial radiotelegraph communication, later adopted by other radio services, especially amateur radio. Used since circa 1909. QN Signals, published by the ARRL and used by Amateur radio operators to assist in the transmission of ARRL Radiograms in the National Traffic System.
Amateur radio operators exchange QSL cards to confirm two-way radio contact between stations. Each card contains details about one or more contacts, the station and its operator. At a minimum, this includes the call sign of both stations participating in the contact, the time and date when it occurred (usually specified in UTC ), the radio ...
Q and Z codes, also called Q and Z signals may refer to: Q code , 3-letter code beginning with Q and used by radiotelegraph and other radio services Z code , 3-letter code used in radio communications