How are airports with control towers represented on Sectional Aeronautical Charts?

Airports with control towers are represented in blue on Sectional Aeronautical Charts, specifically for Class B, C, D, and E airspace. The blue color signifies that these airports have an air traffic control service, indicating that pilots can expect additional guidance, services, and controlled traffic management in these areas. This representation helps pilots easily identify where controlled airspace is present, which is crucial for safety and navigation.

Sectional Aeronautical Charts are designed to provide pilots with visual information about navigation, airspace classifications, and airport details. The use of different colors helps distinguish among various types of airspace and facilities, making it easier for pilots to plan their flights and communicate effectively with air traffic control. The representation in blue for controlled airports ensures clear delineation from uncontrolled airports and facilitates awareness of surrounding airspace operations.