Which of the following is a common radio transmission format used in fire service communication?

The ten-code system, often referred to as "ten signals" or "ten codes," is a method of communication used in radio transmissions among various emergency services, including the fire service. This format utilizes a series of codes that begin with the word "ten" followed by a number, which conveys specific information succinctly and clearly.

For instance, "ten-four" is widely recognized as an acknowledgment, while other codes might indicate various situations or statuses that first responders must communicate quickly and efficiently. The advantage of using this system lies in its brevity and clarity in high-stress situations, allowing responders to transmit information quickly without unnecessary words.

In contrast, other formats mentioned do not commonly serve as a primary method for fire service communications. The five-minute break system typically refers to a scheduling protocol rather than a transmission format. The verbose-message format emphasizes detailed communication, which can lead to longer transmissions that may be impractical in urgent scenarios. The plain language standard has been adopted in many contexts to enhance clarity and understanding among various agencies but is not defined as a common radio transmission format in the same way as the ten-code system.