Wednesday, February 22, 2012

Ten Code Used By APCO

Association of Public(-Safety) Communications Officers (APCO) has an official code list for code numbers that represent common phrases used by law enforcement and other officials as well as by Citizen Band (CB) operators.

You've probably heard some of these in the movies (particularly in the 70's - remember the movies "Smokey and the Bandit," and "Convoy"?), or even in real life ie: Ten - Four (10 - 4) means "acknowledgement/OK" as in "I hear and understood that."

In a survival situation, it could happen that you'll need to know some of this stuff in order to understand communications around you or in order to communicate and convey messages, yourself.

There's nothing pretty about this list, so I'm just going to copy and paste it... it's around on various websites, blogs, etc., and is public domain information.
 

  • 10-0 Caution
  • 10-1 Unable to copy -- change location
  • 10-2 Signal good
  • 10-3 Stop transmitting
  • 10-4 Acknowledgement (OK)
  • 10-5 Relay
  • 10-6 Busy -- stand by unless urgent
  • 10-7 Out of service
  • 10-8 In service
  • 10-9 Repeat
  • 10-10 Fight in progress
  • 10-11 Dog case
  • 10-12 Stand by (stop)
  • 10-13 Weather -- road report
  • 10-14 Prowler report
  • 10-15 Civil disturbance
  • 10-16 Domestic disturbance
  • 10-17 Meet complainant
  • 10-18 Quickly
  • 10-19 Return to ...
  • 10-20 Location
  • 10-21 Call ... by telephone
  • 10-22 Disregard
  • 10-23 Arrived at scene
  • 10-24 Assignment completed
  • 10-25 Report in person (meet) ...
  • 10-26 Detaining subject, expedite
  • 10-27 Drivers license information
  • 10-28 Vehicle registration information
  • 10-29 Check for wanted
  • 10-30 Unnecessary use of radio
  • 10-31 Crime in progress
  • 10-32 Man with gun
  • 10-33 Emergency
  • 10-34 Riot
  • 10-35 Major crime alert
  • 10-36 Correct time
  • 10-37 (Investigate) suspicious vehicle
  • 10-38 Stopping suspicious vehicle
  • 10-39 Urgent -- use light, siren
  • 10-40 Silent run -- no light, siren
  • 10-41 Beginning tour of duty
  • 10-42 Ending tour of duty
  • 10-43 Information
  • 10-44 Permission to leave ... for ...
  • 10-45 Animal carcass at ...
  • 10-46 Assist motorist
  • 10-47 Emergency road repairs at ...
  • 10-48 Traffic standard repair at ...
  • 10-49 Traffic light out at ...
  • 10-50 Accident (fatal, personal injury, property damage)
  • 10-51 Wrecker needed
  • 10-52 Ambulance needed
  • 10-53 Road blocked at ...
  • 10-54 Livestock on highway
  • 10-55 Suspected DUI
  • 10-56 Intoxicated pedestrian
  • 10-57 Hit and run (fatal, personal injury, property damage)
  • 10-58 Direct traffic
  • 10-59 Convoy or escort
  • 10-60 Squad in vicinity
  • 10-61 Isolate self for message
  • 10-62 Reply to message
  • 10-63 Prepare to make written copy
  • 10-64 Message for local delivery
  • 10-65 Net message assignment
  • 10-66 Message cancellation
  • 10-67 Clear for net message
  • 10-68 Dispatch information
  • 10-69 Message received
  • 10-70 Fire
  • 10-71 Advise nature of fire
  • 10-72 Report progress on fire
  • 10-73 Smoke report
  • 10-74 Negative
  • 10-75 In contact with ...
  • 10-76 En route ...
  • 10-77 ETA (estimated time of arrival)
  • 10-78 Need assistance
  • 10-79 Notify coroner
  • 10-80 Chase in progress
  • 10-81 Breathalyzer
  • 10-82 Reserve lodging
  • 10-83 Work school xing at ...
  • 10-84 If meeting ... advise ETA
  • 10-85 Delayed due to ...
  • 10-86 Officer/operator on duty
  • 10-87 Pick up/distribute checks
  • 10-88 Present telephone number of ...
  • 10-89 Bomb threat
  • 10-90 Bank alarm at ...
  • 10-91 Pick up prisoner/subject
  • 10-92 Improperly parked vehicle
  • 10-93 Blockade
  • 10-94 Drag racing
  • 10-95 Prisoner/subject in custody
  • 10-96 Mental subject
  • 10-97 Check (test) signal
  • 10-98 Prison/jail break
  • 10-99 Wanted/stolen indicated

Growing up, I had a dad who was a trucker, so common codes I heard when I rode with him were: 10-4 (OK), 10-20 (location), 10-22 (disregard), 10-74 (negative), and 10-66 (message cancellation). Not many from the list, overall, but a few that stick from way back when.

This list was created sometime around the late 1930's, improved upon in the mid-70's, and has pretty much been a standard list in use since the 70's.

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