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The Pilots Desk
US-FAA14 CFR 71.51

Class C airspace

Read the official rule

This regulation establishes that Class C airspace areas exist around certain airports and that specific operating rules apply within them. The actual locations and dimensions of Class C airspace aren't listed in the regulation itself—instead, they're published in a separate FAA document (Order JO 7400.11K) that's updated periodically.

What matters for pilots: When you fly in Class C airspace, you must comply with Part 91 requirements, which include:

  • Establishing two-way radio communication with ATC before entering
  • Having a Mode C transponder
  • Following ATC instructions

Class C airspace typically surrounds moderately busy airports and extends from the surface to about 4,000 feet above the airport, with an inner and outer shelf. You'll find it at airports like Raleigh-Durham or Burbank. The key practical point is that you need to check the current charts to see where Class C airspace is located, then ensure you meet the equipment and communication requirements before entering.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*

This is an original plain-English explanation for training and reference, not legal advice and not for navigation. Always rely on the current official rule linked above. Last reviewed June 20, 2026.