Which type of airspace requires specific permission to operate sUAS?

Class B airspace is designed to protect busy airports and their surrounding areas, where the density of air traffic is very high. To operate a small Unmanned Aircraft System (sUAS) in Class B airspace, a pilot must receive specific permission from air traffic control. This involves a more rigorous process than for other classes of airspace due to the requirements for coordination with manned aircraft, ensuring safety in an environment with potentially significant air traffic.

In contrast, Class G airspace is uncontrolled airspace with the least restrictions, allowing sUAS operations without special permission. Class C airspace also requires communication with air traffic control, but it is less restrictive than Class B, often allowing for more simplified access under certain conditions. Class E airspace typically has fewer restrictions for UAV operations as well, especially on its lower end. Therefore, the requirement for explicit permission to operate in Class B airspace distinguishes it from these other classifications.