What is the meaning of "10-1" in police terminology?

In police terminology, "10-1" signifies "unable to copy" or indicates that a transmission has not been received clearly, often suggesting a need for a frequency change or adjustment. This code is particularly important in communications among law enforcement personnel, as it prompts the officers to switch to a clearer channel to ensure effective and reliable communication.

Understanding this code is crucial for maintaining safety and efficiency during operations, as clear communication can be vital in high-stress situations. When officers need to change frequencies to avoid interference or improve clarity, recognizing "10-1" allows for quick response and action, ensuring that all personnel are on the same page.

The other options do not accurately reflect the meaning of "10-1." The code for affirmatives, physical altercations, or being out of service is represented by different codes entirely within the police communication lexicon.