How should personnel indicate they have completed a task while at another station?

Personnel should inform the dispatcher after completing a task at another station as this ensures that the communication system is continuously updated about their status and activities. The dispatcher serves as a central point for coordinating operations and relaying information to other personnel and command staff. By communicating completion through the dispatcher, personnel contribute to a clear and accurate record of activities, facilitating effective management and situational awareness.

The other options do involve some form of communication or record-keeping, but they may not provide the immediate and actionable notification that the dispatcher can deliver. Notifying the chief or writing an incident log may not reach all necessary parties in real-time, while filling out a return form could imply a more formal process that delays timely updates. Thus, informing the dispatcher is the most efficient and reliable method to ensure all relevant parties are kept informed of task completions.