Ten-code
From Wikipedia, the free encyclopedia
Ten-codes, properly known as ten signals, are code words used to represent common phrases in voice communication, particularly by law enforcement and in Citizen's Band (CB) radio transmissions. The codes, developed in 1937 and expanded in 1974 by the Association of Public Safety Communication Officials (APCO), allow for brevity and standardization of message traffic. They have historically been widely used by law enforcement officers in North America, although some departments have controversially attempted to prohibit their use.
Code Meaning(s)
10-00
* Officer Down, All Patrols Respond
'(Ten-Double Zero)'
10-0
* Caution
* Death/Dead
* Pursuit
10-1
* Poor Reception
* Officer Needs Help
* Unable to Copy
10-2
* Good Reception
* OK For Now, Continue With Status Checks
10-3
* Stop Transmitting
* Ok, No Further Status Checks Needed
10-4
* Message Received
* Affirmative
* Ok
* Understood
10-5
* Relay
* Pick up an item
10-6
* Busy
* Out At Call
10-7
* Out of Service
* Ending tour of Duty
* Deceased
* Not functional (as a vehicle)
* (Ambulance) On Scene
* Request Break
* Proceeding to ___
10-8
* Back In Service
* On Duty
* Available for next Call
* (Ambulance) In Service / En Route
10-9
* Repeat last message