What type of airspace requires authorization to fly a UAS?

Controlled airspace is the correct choice because it is designated airspace within which air traffic control (ATC) provides instructions and services to manage aircraft movement to ensure safety and efficiency. In controlled airspace, drones or UAS (Unmanned Aircraft Systems) are required to obtain specific authorization before flight. This typically includes Class B, Class C, Class D, and Class E airspaces, which are strategically established around airports and other vital areas to maintain orderly flow and separation of air traffic.

In contrast, uncontrolled airspace, such as Class G, does not require prior authorization for flights, making it less regulated. While restricted airspace does require authorization, it is often designated for specific military or other governmental activities, which could lead to misunderstandings regarding general airspace operations. Therefore, understanding the necessity of authorization in controlled airspace is crucial for safe UAS operations.