How do pilots determine which airspace they are flying in?

Pilots determine the airspace they are flying in primarily by referencing their current sectional or relevant aeronautical charts. These charts provide detailed information about airspace classifications, boundaries, and any limitations or requirements for operating within that airspace. Sectional charts, for example, depict various types of airspace, such as controlled, uncontrolled, restricted, and special use airspace, allowing pilots to understand their current position in relation to these areas.

Through the use of these charts, pilots can also identify important information such as navigational aids, airports, and other pertinent features that influence flight operations. This knowledge is crucial for ensuring compliance with airspace regulations and for safe navigation, especially in complex areas where multiple airspace classes may intersect.