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  2. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]

  3. Police code - Wikipedia

    en.wikipedia.org/wiki/Police_code

    A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or other status ...

  4. List of CB slang - Wikipedia

    en.wikipedia.org/wiki/List_of_CB_slang

    List of CB slang. CB slang is the distinctive anti-language, argot, or cant which developed among users of Citizens Band radio (CB), especially truck drivers in the United States during the 1970s and early 1980s. [1] The slang itself is not only cyclical, but also geographical. Through time, certain terms are added or dropped as attitudes ...

  5. NATO phonetic alphabet - Wikipedia

    en.wikipedia.org/wiki/NATO_phonetic_alphabet

    Technically a radiotelephonic spelling alphabet, it goes by various names, including NATO spelling alphabet, ICAO phonetic alphabet and ICAO spelling alphabet. The ITU phonetic alphabet and figure code is a rarely used variant that differs in the code words for digits.

  6. Radiotelephony procedure - Wikipedia

    en.wikipedia.org/wiki/Radiotelephony_procedure

    It consists of a signalling protocol such as the use of abbreviated codes like the CB radio ten-code, Q codes in amateur radio and aviation, police codes, etc., and jargon. Some elements of voice procedure are understood across many applications, but significant variations exist.

  7. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. They generally vary but often have three basic tiers: Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens.

  8. Maidenhead Locator System - Wikipedia

    en.wikipedia.org/wiki/Maidenhead_Locator_System

    The Maidenhead Locator System (a.k.a. QTH Locator and IARU Locator) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates, which replaced the deprecated QRA locator, which was limited to European contacts. [1]

  9. Numbers station - Wikipedia

    en.wikipedia.org/wiki/Numbers_station

    A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [1] Most identified stations use speech synthesis to vocalize numbers, although digital modes such as phase-shift keying and frequency-shift keying, as well as Morse code transmissions, are not uncommon ...

  10. R-S-T system - Wikipedia

    en.wikipedia.org/wiki/R-S-T_system

    The R-S-T system is used by amateur radio operators, shortwave listeners, and other radio hobbyists to exchange information about the quality of a radio signal being received. The code is a three digit number, with one digit each for conveying an assessment of the signal's readability, strength, and tone. [1] [2] The code was developed in 1934 ...

  11. Call sign - Wikipedia

    en.wikipedia.org/wiki/Call_sign

    In broadcasting and radio communications, a call sign (also known as a call name or call letters —and historically as a call signal —or abbreviated as a call) is a unique identifier for a transmitter station. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even ...