What is 10 4 Good Buddy

Ten-four is a cop code. It means good to go, all right, see ya there, the like. Good buddy was added on by truckers who pick up on jargon by listening to their scanners. So in ten four good buddy, it’s like one truck driver saying to another okay, or right, or whatever it is in the affirmative. Getting back to “good buddy", back in the 70’s when the CB craze was catching on, every wannabe had one. It was also a way a trucker knew whether the person he was speaking to on the radio was a fellow trucker or a poser. Using “good buddy" was a dead giveaway.

What is Good Buddy in 10 4 Good buddy?

Good buddy. In the 1970s, this was the stereotypical term for a friend or acquaintance on the CB airwaves. Now the term “buddy” can be used similarly to the term “good buddy”. Good numbers. Well wishes to a fellow driver. Buddy is most commonly used as an informal word for a friend.

WHO USES 10-4?

While still in some use, ten-codes, including 10-4, have been replaced by plain language in more and more police departments due to variation in what the codes mean. Truckers and other CB radio users still use ’em though.

But 10-4 has become a staple expression for saying “OK” in American pop culture, appearing, as we’ve seen, in everything from old-time TV shows to everyday conservations.

When did the Cops use 10 4 Good Buddy

In practice, most CB users only use a handful, and 10–4 is probably the most common. 10–20 is also common, meaning your location. ‘What’s your twenty?’ is a reference to this code. Another is 10–10, meaning “standby” ‘Hang ten’ is a reference to this code when you want someone to wait a few seconds while you do something.

The point of the 10 code is to convey a very precise meaning without ambiguity, especially under poor signal conditions, where a spoken instruction could be difficult to make out. I believe it originated with US police use, though the exact meaning assigned to codes varies: Police 10 Codes

CB usage also varies, with new codes being added and existing ones changed according to local customary use. However, very common ones like 10–4 don’t change.b The ‘good buddy’ part is just a customary greeting used on CB.

When and Why was the 10 4 introduced?

In the 1930s, radio technology was still relatively new and limited. For starters, there were limited police radio channels, so officers couldn’t stay on the line too long or else others wouldn’t be able to get through. The ten-codes were invented to communicate information quickly and clearly.

The use of the number 10 before all of the codes was another workaround. It took a split second for the motor-generator in the radios to warm up, and so the first syllables of a radio transmission were often lost. The 10 was used as a placeholder to give the motor-generator time to speed up enough to hear the second part of the code. 4 was simply chosen to mean “acknowledgment” of a message (10-3 meant “stop transmitting” in case you wanted to know).

These handy codes were quickly adopted by others communicating via radio, such as CB (Citizen Band) radio enthusiasts and truckers.

Helping to popularize 10-4 in the mainstream was the 1950s TV crime drama Highway Patrol, starring Broderick Crawford, known for starting his conversations on his radio with 10-4. Oh, the ’50s.

The expression 10-4 further spread into popular culture when it was featured in C. W. McCall’s 1975 song “Convoy,” where he uses trucker CB radio slang like breaker one-nine (a radio channel used by truckers) and 10-4. The song went number one on the charts in the US and abroad and was even made into a movie in 1978.

Here is a table showing all cop codes :

Code General Purpose APCO (Association of Police Communications Officers) Norfolk, VA **Walnut Creek, CA
10-0 Use Caution
10-1 Unable Copy - Change Location Signal Weak Police Officer Needs Help Poor Radio Reception
10-2 Signal Good Signal Good Assist Officer Good Radio Reception
10-3 Stop Transmitting Stop Transmitting Clear the Air-Emergency Stop Transmission
10-4 Acknowledgment (OK) Affirmative (OK) O.K., Acknowledgment Message Received
10-5 Relay Relay To/From See a Complainant Relay Message
10-6 Busy - Unless Urgent Busy Investigation Police or Fire Change Radio Channel
10-7 Out of Service Out of Service (a) Out of Service - Off the Air
(b) Out of Service - Subject to Call Out of Service
10-8 In Service In Service In Service In Service
10-9 Repeat Say Again Arrived at Scene Repeat Message
10-10 Fight In Progress Negative Traffic Detail Off Duty
10-11 Dog Case ___ On Duty (Employee Number) Broken Glass Visitors Can Hear Radio
10-12 Stand By (Stop) Stand By (Stop) Vandalism Advise Weather/Road Conditions
10-13 Weather-Road Report Weather Conditions (a) Leaking Water Main or Sewer
(b) Hole in the Street / Sidewalk
10-14 Prowler Report Message/Information Convoy or Escort
10-15 Civil Disturbance Message Delivered Have Prisoner in Custody Have Prisoner in Custody
10-16 Domestic Problem Reply to Message Pick Up Prisoner Pick Up
10-17 Meet Complainant Enroute Administrative Assistance Getting Fuel
10-18 Quickly Urgent Detail
10-19 Return to _____ (In) Contact Return to Station Return or Go to ___
10-20 Location Location What is Your Location Location
10-21 Call ( ) by Phone Call ( ) by Phone Call ___ by Telephone Telephone
10-22 Disregard Disregard Investigate a Break In Cancel or Disregard
10-23 Arrived at Scene Arrived at Scene Breaking In (In Progress) Stand By
10-24 Assignment Completed Assignment Completed Someone in the Building
10-25 Report in Person (Meet) Report to (Meet) Prowler Do You Have Contact With ___?
10-26 Detaining Subject, Expedite Estimated Arrival Time (ETA) Larceny Clear of Warrants
10-27 (Drivers) License Information License / Permit Information Rape Report Subject Wanted
10-28 Vehicle Registration Information Vehicle Information Check Full Registration, License, Motor, Name, Stolen Registration Check
10-29 Check for Wanted Records Check Person with a Gun Check for Warrants
10-30 Unnecessary Use of Radio Danger / Caution (a) Vehicle Accident

What is The Ten-Codes

The ten-codes or ten-signals are code words used as stand-ins for common phrases in radio communication. Charles Hopper, a communications director with the Illinois State Police, developed them in 1937 to combat the problem of the first syllables or words of transmission being cut off or misunderstood.

Preceding every code with “ten” gave the sometimes slow equipment time to warm up and improved the likelihood that a listener would understand the important part of a message. The codes also allowed for brevity and standardization in radio message traffic.

The codes were expanded by the Association of Public-Safety Communications Officials-International (APCO) in 1974 and were used by both law enforcement agencies and civilian CB radio users. Over time, differing meanings for the codes came about in different agencies and jurisdictions, undoing the codes’ usefulness as a concise and standardized system.

The problem came to a head in 2005 during rescue operations after Hurricane Katrina. After several instances of inter-agency communication problems, the United States Federal Emergency Management Agency (FEMA) discouraged the use of ten-codes and today the federal government recommends they be replaced with plain, everyday language. Here’s the official APCO list.

Code : Roger That

In the days of the telegraph, the Morse code letter R (dot-dash-dot) was sometimes used to indicate “received” or “message received/understood.” When radio voice communication began to replace telegraphs, Roger, the codeword assigned to the letter R in the Joint Army/Navy Phonetic Alphabet (the radio alphabet used by all branches of the United States military from 1941 to 1956), took on the same role.

Contrary to what Hollywood would have you think, Roger only means “the last transmission received/understood” and does not also mean or imply “I will comply.” Wilco (Will Comply) is the code used if the speaker intends to convey “message received and will comply.” Given that, the phrase Roger Wilco, which you so often hear in the movies, is redundant and not really used since Wilco alone covers all the bases and acknowledges receipt of a message and states intent to comply.’

Code : Mayday

Mayday is an international code word used to signal life-threatening emergencies. It was originated in 1923 by Frederick Stanley Mockford, a senior radio officer at London’s Croydon Airport. He was given the task of coming up with a unique and easily understandable emergency code word. Most of the air traffic at Croydon was either coming from or going to Le Bourget Airport in Paris, so Mockford chose mayday because of its similarity to the French maider (“come help me”).

Because it is an emergency signal, there are plenty of rules governing the use and format of a mayday call. A mayday call can only be made when life or craft is in imminent danger of death or destruction (and, as with fake 9-1-1 calls, fake mayday calls are considered serious crimes. In the U.S., making a fake distress call is a federal crime that can carry large fines and jail time), and once one is made, no other messages can be transmitted except to assist in the emergency.

The correct format for a Mayday call is:

  • “Mayday, Mayday, Mayday.” The call is always given three times in a row to keep it from being mistaken for a similar-sounding phrase, or to distinguish an actual distress signal from a message about a mayday call.

  • “This is ____.” The vessel name is repeated three times, followed by a call sign if available.

  • “Mayday. [vessel name].”

  • “My position is ____.” The position is given in latitude-longitude coordinates or bearing and distance from a fixed point.

  • “I am _____.” The type of emergency, e.g. fire or sinking.

  • “I require immediate assistance.”

  • “I have _____.” The number of people on board and their condition, as well as any other pertinent information, e.g. abandoning to life rafts.

  • “Over.”

Some radio instructors suggest the mnemonic MIPDANIO for learning mayday signal format: Mayday, Identify, Position, Distress, Assistance, Number of crew, Information, Over.

What is the Origin of 10 4 Good Buddy?

This phrase originates from the North American “CB” culture of the 1970s that was highly popularized by Hollywood films, commonly in road comedies like Cannonball Run and Smokey and the Bandit.

CB (Citizen’s Band) radios were widely used in the heavy trucking industry, which created a niche user community thus developing a then unique camaraderie akin to today’s online gaming community. True friendships are made where individuals may never meet in real life.

“Ten-four (10–4)” is borrowed from the ordered and disciplined police radio voice procedure. As a code, it denotes acknowledgment of a previous statement. “Good buddy” however is a very familiar and endearing term conjuring American southern hospitality. The confluence of the two statements creates a deliberately ironic expression that is at once officious and informal.

The Ten-codes (officially the Ten Signals) are used by American police departments for both clarity and brevity in radio communications. They were originally developed beginning in 1937, and have been both revised and extended several times since. Ten-four is a universal acknowledgment code (as in OK), going back to the original development of the code, and indicates both receipt and acknowledgment of the prior message. It is a combined “Rodger" and “Wilco".

With the advent of CB radio for civilian use, many of the 10 codes were adopted by CB users and later somewhat modified by popular usage. 10-4 retains its original meaning and usage, but its reverse, or 4-10, is now a request for acknowledgment.

“Good buddy" is basically a polite form of address that does not require the repeating of the “handle” or radio nickname of the person addressed. Please remember that CB is an open channel environment where several people may be on the channel simultaneously.

Therefore “10-4, good buddy" is the rough equivalent of saying “Rodger, Wilco, sir", and considerably more clear and concise over an open channel.

Translation: Channel Break, Channel 19 I-480, eastbound, Traffic Police at the eastern end of the Cuyahoga Valley bridge, acknowledge?

“10-4, good buddy. Shuttlecraft Galileo, into the sun, and backing down. You’re clean and green into the sunset.”

Translation: Rodger, sir. SG acknowledges. I’m approaching the trap, slowing as appropriate. There is nothing for you to worry about ahead on the westbound side.

“10-4, good buddy. (handle), out.”

Translation: Rodger, and thanks. This is (handle), over and out. The channel is now clear for other users.

Frequently Asked Questions (FAQs)

What does the phrase 10 4 Good Buddy mean?

I am not sure why, but “10–4” means “affirmative” or “yes” or “correct,” and “good buddy” is an informal, friendly way of addressing another driver or trucker. This phrase can be used outside of trucking now since the slang is understood by the general public through a song that was released in 1970.

What does it mean 10 4?

10-4 is an affirmative signal: it means “OK.” The ten-codes are credited to Illinois State Police Communications Director Charles Hopper who created them between 1937–40 for use in radio communications among cops.

What does good buddy mean in the trucker talk?

Good buddy. In the 1970s, this was the stereotypical term for a friend or acquaintance on the CB airwaves. Now the term “buddy” can be used similarly to the term “good buddy”. Good numbers. Well wishes to a fellow driver.

What does a 10 20 mean?

The phrase essentially means, “What is your location?” or “Identify your position,” but is a corrupted phrase from the original “10-20” used by law enforcement to verbally encode their radio transmissions so that non-police listeners would not easily discover police operations, as well as to communicate quicker and.

What is Buddy slang for?

(Entry 1 of 2) informal: a close friend. US, informal + sometimes impolite used to address a man who you do not know. : a person who does some activity with you. buddy.

What’s a 10 10 in police talk?

10-8 In-service/available for assignment. 10-9 Repeat last transmission. 10-10 Off duty. 10-10A Off duty at home.

What does a 10 5 mean?

10-2 Signal good. 10-3 Stop transmitting. 10-4 Acknowledgement (OK) 10-5 Relay. 10-6 Busy–stand by unless urgent.

What does 10 10 means on the radio?

10-8 Doing great, sounding good, can mean “good stuff” or got it right. 10-9 Repeat message. 10-10 Transmission completed, standing by. 10-11 Talking too rapidly. 10-12 Visitors present.

What does a 10 1 mean?

10-1. Unable Copy - Change Location. Signal Weak. Police Officer Needs Help.

What is a 10 42 police code?

One “Ten Code” that is not as familiar to the general public is “10-42”. This particular code is used to indicate an officer’s end of the tour. When a law enforcement officer is killed in the line of duty, there are often federal and state benefits that are directed to the officer’s family.


If I sum this Article up in some lines, 10 4 good buddy is a code which is mostly used by cops, it means good to go. Cops use it when they catch criminals or some major serial killers. It means that they are now good to go. Good buddy was added on by truckers who pick up on jargon by listening to their scanners. So in ten four good buddies, it’s like one truck driver saying to another okay, or right, or whatever it is in the affirmative

Truckers felt that Hollywood had hijacked the phrase “good buddy" and showed their disdain for it by giving it its new, negative connotation. It was also a way a trucker knew whether the person he was speaking to on the radio was a fellow trucker or a poser.

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10 4 Good Buddy was only used for police station and for truckers?
What is its value now a days. Still it a source of communication in some countries?