What term is used when a unit is actively engaged in duty?

The term "in service" is used to indicate that a unit is actively engaged in duty. This designation means that the personnel and equipment are available for response, actively responding to calls, or participating in operational tasks. When a unit is "in service," it signifies readiness and operational capability to assist the community or fulfill their assigned law enforcement responsibilities.

In contrast, being "busy" might suggest that a unit is occupied with a specific task, but it does not necessarily imply that the unit is performing its broader duty or is fully operational. "Out of service" indicates that a unit is not available for duty, perhaps due to maintenance or other reasons that render it inactive. The term "relay" typically refers to communication or coordination functions rather than the status of being actively engaged in duty. Thus, "in service" is the most accurate term that captures the essence of a unit actively performing its roles and responsibilities.