What Is a 10-21a Police Code? 10-21a Police Code
The 10-21a police code meaning for the police forces is Advise Home I Will Return At [ETA – Estimated Time of Arrival].
Poice codes were first first presented as APCO Ten Signals in 1937 to make sure the communication between policemen are most efficient. 10-21 police code is one of the short codes used to make sure there is no mistake with the message, in this case it the meaning is Call By Telephone.
What Is Advise Home I Will Return At [ETA – Estimated Time of Arrival]? Police Code for Advise Home I Will Return At [ETA – Estimated Time of Arrival]
The Police Code for Advise Home I Will Return At [ETA – Estimated Time of Arrival] is 10-21a.
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10-21a Police Code is one of many police codes used every day for the communication by the emergency forces – you can listen to 10-21a Police Code using a police code scanner.
Police codes were developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO).
The most used police code used is when an officer retires a call to dispatch is made. The officer gives a 10-7 code (Out of service) and then a 10-42 code (ending tour of duty).
APCO first proposed Morse code brevity codes in the June 1935 issue of The APCO Bulletin, which were adapted from the procedure symbols of the U.S. Navy, though these procedures were for communications in Morse code, not voice.
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