Available units shall acknowledge by advising on the appropriate talk group which message?

• A. En-route only
• B. En-route and their current location
• C. Arrived and location
• D. On scene

Answer: (B)

The key idea is that when a unit becomes available, the acknowledgment should provide both status and position to keep incident command and other responders informed. Saying you are en-route confirms you are on the way, and adding your current location gives a real-time picture of where you are. This combination allows the incident commander to track progress, estimate arrival time, coordinate arrivals with other units, and maintain accountability on the scene. Providing only en-route would leave location details out, while other status options like arrived or on scene would imply you’ve already reached the area or are already there, which isn’t accurate at the moment of acknowledgment.