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  1. www.police1.com › police-products › communicationsPolice 10 codes vs. plain language: The history and ongoing ...

    Sep 3, 2024 · The Association of Police Communications Officers first proposed brevity codes, an adaptation of the U.S. Navy procedure symbols, in the June 1935 issue of The APCO Bulletin. The development of more widely used police codes, or APCO 10 Signals, began in 1937, when police radio channels were limited to reduce use of speech on the radio.

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  3. en.wikipedia.org › wiki › Ten-codeTen-code - Wikipedia

    The development of the APCO Ten Signals began in 1937 [5] to reduce use of speech on the radio at a time when police radio channels were limited. Credit for inventing the codes goes to Charles "Charlie" Hopper, communications director for the Illinois State Police, District 10 in Pesotum, Illinois.

  4. policecodes.net › ten-codesPolice Radio 10-Codes - Police Codes

    Police Radio 10-Codes. Ten-codes, also known as 10-codes or ten signals, are code words used by many police officers to aid with voice communication. The codes were originally developed in 1937 to allow for brevity, clarity, and standardization of messages transmitted over radio channels. On old radio systems, channels were limited so messages ...

    Code
    Description
    10-00
    Officer down, all patrols respond
    10-0
    Use caution
    10-1
    You are being received poorly / Cannot ...
    10-2
    You are being received clearly / Signal ...

    See full list on policecodes.net

  5. www.einvestigator.com › police-ten-codesPolice 10 Codes (Ten Codes) for Law Enforcement Radio

    Feb 1, 2024 · How did Police 10 Codes Originate? Originally, police 10 codes were used in the United States law enforcement community before the Second World War. In 1940, the Association of Public Safety Communication Officials (APC) published the first official set of police 10 codes. These radio signals were invented to help reduce the use of speech on ...

  6. www.police1.com › resources › articlesPolice codes: List of police 10 codes

    Jun 13, 2024 · 10-83. Smoke Visible. 10-84. No Smoke Visible. 10-85. Respond Without Blue Lights/Siren. Fill out the form on this page to download a PDF of this list. This article, originally published on September 26, 2016, has been updated. 911 and Dispatch Communications Interoperability Patrol Issues Police News.

    Code
    Meaning
    10-0
    Use Caution
    10-1
    Signal Weak
    10-2
    Signal Good
    10-3
    Stop Transmitting

    See full list on police1.com

  7. www.msn.com › en-us › newsThe meaning behind 10-4 and the 10 Code list - MSN

    10-3: Stop Transmitting. 10-4: Acknowledgement (OK) 10-10: Fight in Progress. 10-29: Check for Wanted. 10-31: Crime in Process. 10-33: Emergency. So whether it’s police communication you’re ...

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  9. www.msn.com › en-us › newsFrom 10-4 to 10-99: What Every Police Radio Code Stands For ...

    The use of police radio codes dates back to 1937 when they were introduced to bring brevity and clarity to radio communications.1 These “10-codes” are still widely used today to ensure swift ...

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