Drone Pilot Practice Exam

How are Class C airspace altitudes typically represented on sectional charts?

1. In feet above ground level (AGL)

2. In nautical miles (NM)

3. In feet in mean sea level (MSL)

4. In kilometers (KM)

The correct answer is: In feet in mean sea level (MSL)

Class C airspace altitudes are represented in feet above mean sea level (MSL) on sectional charts. This is the standard representation for airspace altitudes, as it provides a consistent reference point for pilots navigating through different layers of airspace. Understanding MSL is crucial for ensuring safe altitude separation between aircraft and for maintaining proper vertical navigation, especially in areas with varying terrain elevations. Using mean sea level as the standard reference allows pilots to have a common understanding of altitude regardless of their geographic location, as elevations can differ significantly from one area to another. It's essential for pilot situational awareness and ensures compliance with airspace regulations. The other options represent different types of measurements that are not applicable in this context. For instance, feet AGL refers to the height above the ground, and nautical miles measure horizontal distance rather than vertical altitude. Kilometers would also not be appropriate, as aviation in the United States primarily uses feet for altitude measurements.