Drone Pilot Practice Exam

How are altitude boundaries of Class B airspace displayed on sectional charts?

1. In feet Above Ground Level (AGL)

2. In feet mean sea level (MSL)

3. Using color codes that indicate altitude ranges

4. With dashed lines representing the different layers

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

Altitude boundaries of Class B airspace are displayed in feet mean sea level (MSL) on sectional charts. This is essential for pilots to understand because MSL provides a standardized reference point for measuring altitude across different geographic areas. By using MSL, pilots can more accurately determine their altitude in relation to the airspace and surrounding terrain, which is critical for safety and navigation, especially when operating in busy airspaces like Class B. The other options may involve important aspects of aviation charting but do not accurately represent how Class B airspace boundaries are communicated. For instance, while AGL is relevant for an individual’s altitude concerning the ground, it is not used for airspace classifications such as Class B, which must consider elevation above sea level for consistency and safety. Color coding might be used to indicate certain areas on a chart but does not specify the altitudes directly. Dashed lines may represent airspace boundaries, but they do not indicate the precise altitude information needed by pilots. Thus, understanding that MSL is the method utilized for displaying altitude boundaries in Class B airspace is key for effective navigation and compliance with regulations.