How should units acknowledge a 900 code assignment?

• A. By logging it only.
• B. By waiting for the next routine broadcast.
• C. By using a different channel.
• D. By repeating the code or assignment, confirming receipt, and providing ETA if applicable.

Answer: (D)

When a 900 code assignment is given, the unit should acknowledge by repeating the code or assignment, confirming receipt, and providing an ETA if applicable. This explicit acknowledgment ensures the dispatcher knows the instruction was heard, understands the task, and can track timing and resources. It prevents confusion from missed or garbled messages and keeps operations coordinated. Simply logging the assignment without verbal confirmation leaves room for miscommunication, while waiting for a routine broadcast or switching to another channel can cause delays or create gaps in understanding, which could impact response effectiveness. Repeating the assignment and confirming receipt with an ETA keeps communication clear and ensures accountability.