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  2. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    The Chicago Police Department uses the radio code '10-1', which means an officer needs urgent help right away. The Chicago P.D. (TV series) TV show also uses '10-1' as well. [ 16 ]

  3. Police code - Wikipedia

    en.wikipedia.org/wiki/Police_code

    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 ...

  4. List of CB slang - Wikipedia

    en.wikipedia.org/wiki/List_of_CB_slang

    Radio check or test. 10-33 Emergency traffic, clear the channel. CB code for Mayday for trucks and police cars. 3s and 8s Well wishes to a fellow driver. Borrowed from amateur radio telegraphy codes "73" (best regards) and "88" (hugs and kisses). 10-36 The correct time ("Can I get a 10-36?"). 10-41 Driver is signing on or changed the channel on ...

  5. APCO radiotelephony spelling alphabet - Wikipedia

    en.wikipedia.org/wiki/APCO_radiotelephony...

    The APCO phonetic alphabet, a.k.a. LAPD radio alphabet, is the term for an old competing spelling alphabet to the ICAO radiotelephony alphabet, defined by the Association of Public-Safety Communications Officials-International [1] from 1941 to 1974, that is used by the Los Angeles Police Department (LAPD) and other local and state law enforcement agencies across the state of California and ...

  6. Emergency service response codes - Wikipedia

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

    United States. [] 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.

  7. List of Chicago P.D. characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Chicago_P.D...

    Chicago Police Department United States Army. Intelligence Unit; Undercover assignment (CF: S2) Patrol (pre-CF) [3] Active Guard Reserve, US Army; 3rd Battalion, 75th Ranger Regiment, US Army; Years of service: 2006–2022 2001–2006; 2022–present : Rank: Detective, CPD Sergeant, US Army: Badge No. 51163: Radio Code: 5021 George

  8. Call signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Call_signs_in_the_United...

    The original radio stations were primarily used for private point-to-point communication. The early 1920s saw the introduction of radio broadcasting, and by the end of 1922 there were over 500 broadcasting stations operating in the United States. Most of the first broadcasting stations received randomly assigned three-letter call signs.

  9. Chicago Police Department - Wikipedia

    en.wikipedia.org/wiki/Chicago_Police_Department

    Chicago Police camera in 2006 Chicago Police helmet & billy-club circa 1968. Chicago police officers are required to buy their own duty equipment (except Taser x2 and Motorola radio Motorola phone). [114] All field officers must also be qualified to carry a Taser. Some officers choose to carry a backup weapon as well, which must meet certain ...