Which code indicates the unit is out of service?

Which code indicates the unit is out of service?

• A. Location of the officer or incident.
• B. In service; available for calls.
• C. Acknowledge; message received and understood.
• D. Out of service; not available for calls.

Answer: (D)

In radio dispatch, units signal their availability with status phrases. Out of service means the unit is temporarily unavailable for calls—for example, on a break, traveling, or handling other duties. The exact wording "Out of service; not available for calls" communicates this clearly, making it the correct way to indicate unavailability. In contrast, "In service; available for calls" shows readiness for new assignments. "Location of the officer or incident" is a location report, not a status flag. "Acknowledge; message received and understood" confirms receipt of a message, not availability.

In radio dispatch, units signal their availability with status phrases. Out of service means the unit is temporarily unavailable for calls—for example, on a break, traveling, or handling other duties. The exact wording "Out of service; not available for calls" communicates this clearly, making it the correct way to indicate unavailability. In contrast, "In service; available for calls" shows readiness for new assignments. "Location of the officer or incident" is a location report, not a status flag. "Acknowledge; message received and understood" confirms receipt of a message, not availability.