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AirspaceQuestion 139 of 934

What are the vertical limits of the 10 NM shelf area of a typical Class C airspace area?

  1. From the surface, up to 2,500 feet above the airport elevation
  2. No lower than 1,200 feet, up to 4,000 feet above the airport elevation
  3. No lower than 700 feet, up to 10,000 feet MSL
  4. No lower than 1,200 feet, up to 2,500 feet above the airport elevation
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Correct answer: No lower than 1,200 feet, up to 4,000 feet above the airport elevation

The Class C shelf starts no lower than 1,200 feet and ends 4,000 feet above the airport.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 3-2-4 Class C Airspace, page 182

Practice airspace

Questions last reviewed: 18 October 2026