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A police radio 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 ...
Code 1: Respond to the call without lights or sirens. Some agencies may use the terms "upgrade" and "downgrade" to denote an increase or decrease in priority. For example, if a police unit is conducting a Code 1 response to an argument, and the dispatcher reports that the argument has escalated to a fight, the unit may report an "upgrade" to a ...
The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [ 1 ] The codes, developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), allow brevity and standardization of message traffic.
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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 ...
In the United States, certification and licensure requirements for law enforcement officers vary significantly from state to state. [1] [2] Policing in the United States is highly fragmented, [1] and there are no national minimum standards for licensing police officers in the U.S. [3] Researchers say police are given far more training on use of firearms than on de-escalating provocative ...
The temperature of the testing environment should rest at an average of 23 Degrees Celsius. Paper used in the testing procedure must approximate the medium weight paper and conform to the printers approved specifications. The full standard is published by the ISO/IEC JTC 1/SC 28 subcommittee.
The teleprinter system improved message speed and delivery time, making it possible for messages to be flashed across a country with little manual intervention. [5] There were a number of parallel developments on both sides of the Atlantic Ocean. In 1835 Samuel Morse devised a recording telegraph, and Morse code was born. [6]