How is the boundary of Class C airspace depicted on a sectional aeronautical chart?

The boundary of Class C airspace is depicted in magenta on a sectional aeronautical chart. This color helps pilots easily identify the limits and structure of such airspace. Class C airspace typically extends from the surface up to 4,000 feet above the airport elevation and is associated with airports that have a moderate level of air traffic.

The use of magenta is consistent across aeronautical charts, providing a visual cue that creates a standard interpretation of airspace classifications for pilots. This aids in situational awareness and helps ensure that pilots are following the appropriate communication and navigation protocols when operating in or near these areas. Understanding these visual representations is essential for effective flight planning and maintaining compliance with air traffic regulations.