Q code: Difference between revisions

Revision as of 08:07, 3 November 2023

Revision as of 19:37, 28 November 2023

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{{short description|Type of Morse code operating signal}}

{{distinguish|QR code}}

{{Redirectdistinguish|QR code|Wikidata#Main parts}}{{redirect|QRO|the airport in Mexico|Querétaro International Airport}}

{{EngvarB|date=April 2021}}

{{UseengvarB|date=April 2021}}{{use dmy dates|date=May 2023}}

[[Filefile:Ll-Telegraph1.png|thumb|right|200px|This one of a set of articles on telegraphy.]]

The '''Q-code''' is a standardised collection of three-letter codes that each start with the letter "Q". It is an [[Operating signals|operating signal]] initially developed for commercial [[radiotelegraphy|radiotelegraph]] communication and later adopted by other radio services, especially [[amateur radio]]. To distinguish the use of a Q-code transmitted as a question from the same Q-code transmitted as a statement, operators either prefixed it with the military network question marker "{{overline|INT}}" (dit dit dah dit dah) or suffixed it with the standard Morse question mark {{overline|UD}} (dit dit dah dah dit dit).