Q code: Difference between revisions

Revision as of 22:40, 21 May 2023

Revision as of 08:14, 28 May 2023

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==Early development==

The original Q-codes were created, ''circa'' 1909, by the British [[government]] as a "List of abbreviations ... prepared for the use of British ships and coast stations licensed by the [[Postmaster General of the United Kingdom|Postmaster General]]".<ref>{{cite book |last=Great Britain|first=Post Office|date=October 1909|title=Handbook for wireless telegraph operators working installations licensed by His Majesty's postmaster-general|oclc=40616664|___location=London|publisher=His Majesty's Stationery Office|at=appendix iii}}</ref> The Q-codes facilitated communication between maritime radio operators speaking different [[language]]slanguages, so they were soon adopted internationally. A total of forty-five Q-codes appeared in the "List of Abbreviations to be used in Radio Communications", which was included in the Service Regulations affixed to the [[International Radiotelegraph Convention (1912)|Second International Radiotelegraph Convention in London]] (The Convention was signed on July 5, 1912, and became effective July 1, 1913.)

The following table reviews a sample of the all-services Q-codes adopted by the 1912 convention:

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==Breakdown by service==

*QAA to QNZ – Assigned by the [[International Civil Aviation Organization]] (ICAO).

*QNA to QNZ – The [[American Radio Relay League]] (ARRL) has also developed its own [[QN Signals]] for message handling located in this range. Even though they overlap with other signals, the ARRL determined that their exclusive use in [[National Traffic System|NTS]] nets limits confusion.

*QOA to QQZ – For the [[Maritime Mobile Service Q Codes|Maritime Mobile Service]].

*QRA to QUZ – Assigned by the International Telecommunication Union Radiocommunication Sector ([[ITU-R]]).

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== See also ==

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* [[ACP-131]]

* [[NOTAM Code]]

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* [[Ten-code]]

* [[Z code]]

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== Footnotes ==

{{notelist}}