Which airspace extends from the surface to 2,500 feet AGL, may have a unique shape for approaches to the airfield, and requires 2-way radio contact; sUAS may not enter without FAA authorization?

• A. Class B
• B. Class E
• C. Class D
• D. Class C

Answer: (C)

This describes Class D airspace. It surrounds airports with a control tower and extends from the surface up to 2,500 feet above the airport (AGL), and its boundaries can be irregular to fit the field. A key feature is that two-way radio communication with the tower is required before entry, so pilots or remote pilots must establish contact prior to operating inside. For sUAS operations, FAA authorization is also required to enter this controlled airspace, typically obtained through LAANC or another approved process. In contrast, Class B surrounds the busiest airports and is structured in multiple shelves with higher ceilings and stricter clearance requirements; Class C usually has a core and outer area with different vertical limits and radar services; Class E is controlled airspace that often starts at higher altitudes (or at the surface in some locations) and does not inherently require two-way radio communication with ATC.