Air Traffic Control Airspace Classes Knot 
Pilot Institute
JUNE 27, 2025
The FAA defines controlled airspace as “a generic term that covers the different classifications of airspace (Class A, Class B, Class C, Class D, and Class E airspace) and defined dimensions within which air traffic control service is provided to IFR and VFR flights.”
Pilot Institute
SEPTEMBER 26, 2024
Before entering Class C airspace, pilots must receive clearance from Air Traffic Control (ATC). ATC offers IFR and VFR aircraft separation services in Class C. Only enter Class C after receiving authorization from ATC. Before flying into Class C airspace, a pilot must obtain a clearance from ATC.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Pilot Institute
MAY 7, 2025
Key Takeaways Weather minimums vary by airspace class, altitude, and time of day. Class E above 10,000 ft and Class G below 1,200 ft have special rules. A Koji triangle, divided into the different airspace classes and minima, can be learned in minutes. What are the Weather Minimums for VFR Flight?
Flight Training Central
AUGUST 19, 2024
Fly at or below FAA-authorized altitudes in controlled airspace (Class B, C, D, and surface Class E designated for an airport) only with prior FAA authorization by using LAANC or DroneZone. Fly at or below 400 feet in Class G (uncontrolled) airspace. Maximum speed is 100 mph (87 knots).
Expert insights. Personalized for you.
Let's personalize your content