What type of event must the student promptly inform the Supervisor about that impacts sector operations?

The correct response highlights the importance of communicating significant impact events to the Supervisor. These events typically include situations that could directly affect the safety or efficiency of sector operations, such as emergencies, malfunctions, or unexpected changes in traffic flow. Prompt notification allows the Supervisor to take immediate action, coordinate responses, and ensure that appropriate measures are implemented to maintain safe operations.

In contrast, routine flight updates and weather forecasts are part of standard operational procedures and can typically be monitored without urgent reporting, as they do not usually require immediate intervention. General crew changes also fall into a category of regular procedure and do not usually constitute an event requiring immediate notification to the Supervisor regarding direct impact on operations. Understanding the distinction between routine communications and significant events is crucial for effective operation management in a radar-tracking environment.