How is the Terminal Radar Service Area (TRSA) depicted on charts?

The correct depiction of a Terminal Radar Service Area (TRSA) on charts is represented by a grey ring. This visual indication helps pilots easily identify the boundaries of the TRSA, which provides additional radar services to aircraft operating in and around busy terminal areas.

The grey ring signifies the zone where pilots can receive traffic advisories and additional separation services, enhancing safety and efficiency while flying near busy airports. Understanding this representation is crucial for pilots as it aids in navigation and compliance with air traffic control procedures within the TRSA boundaries.

Other options do not represent a TRSA. For instance, dotted lines and shaded areas serve different purposes and indicate different types of airspace or services, while star symbols are not related to Terminal Radar Service Areas. Thus, recognizing the grey ring as the correct representation enables pilots to visually and efficiently navigate airspace where TRSA services are available.