Drone Pilot Practice Exam

What is the minimum altitude required to enter Class A airspace?

1. 1,000 feet MSL

2. 5,000 feet MSL

3. 10,000 feet MSL

4. 18,000 feet MSL

The correct answer is: 18,000 feet MSL

The minimum altitude required to enter Class A airspace is 18,000 feet Mean Sea Level (MSL). This airspace classification is specifically designed for high-altitude flight and encompasses airspace from 18,000 feet MSL up to and including FL 600 (flight level 600). The transition to Class A airspace occurs at this altitude to ensure aircraft operating in this environment are under Instrument Flight Rules (IFR) and can maintain safe separation from each other, as this region typically experiences higher traffic and requires more stringent air traffic control. Airspace classifications are structured to create safe operating environments based on altitude; thus, Class A airspace is uniquely defined beginning at 18,000 feet MSL to accommodate the needs of commercial airline operations, cargo flights, and other aircraft flying at high altitudes. Understanding these altitude thresholds is vital for drone pilots and other aviators to navigate the airspace system safely and comply with regulatory requirements.