What type of airspace includes Terminal Radar Service Areas?

Terminal Radar Service Areas (TRSAs) are designated areas around busy airports to provide additional air traffic services to help manage the flow of air traffic, particularly during takeoff and landing phases. These areas aim to enhance safety and efficiency for both aircraft and air traffic control.

Class E airspace is the correct answer because TRSAs exist within this airspace classification. Class E airspace is controlled airspace that extends from either the surface or a specified altitude up to but not including 18,000 feet, and it often encapsulates areas surrounding busy airports where radar services are offered. In these areas, pilots can opt to receive radar flight following, which helps with collision avoidance and situational awareness.

Understanding the parameters and purpose of TRSAs is critical for pilots operating near congested airports where a higher level of service and coordination with air traffic control is mandatory.