What does "10-10" indicate in communication?

In police communication, "10-10" is used to indicate "Out of service/subject to call." This means that a unit is not currently available for assignments or radio traffic but can still respond if needed or in emergencies. This code is crucial for managing resources effectively, ensuring that there is always a unit on standby that can be called upon when necessary, even when they are temporarily unavailable.

Understanding this code is important for ensuring clear and concise communication within the department. "Out of service" by itself could mean that the officer is unavailable for any calls, while "subject to call" implies they can respond if needed, allowing for a more flexible resource management strategy in law enforcement. Additionally, this knowledge helps officers understand their own status and the status of their colleagues, aiding in coordination during operations or emergencies.