There are four (4) predictable instances for when you might need to communicate on your radio. The first is before commencement. What are the other three(3)?

Sure, here is the step-by-step response:

1. Before commencement: This is the first instance when you might need to communicate on your radio. It involves making sure that all systems are ready and that everyone involved is prepared for the task ahead.

2. During the operation: The second instance is during the operation itself. Continuous communication is crucial to ensure that everything is proceeding as planned and to address any issues that may arise in real-time.

3. After completion: The third instance is after the operation has been completed. This involves confirming that the task has been successfully finished and that all participants are aware of the completion.

4. In case of emergencies: The fourth instance is in case of emergencies. Immediate communication is necessary to manage and mitigate any unexpected situations or hazards that occur.