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AirspaceQuestion 137 of 934

What is the Mode C veil?

  1. Airspace within 10 NM of any towered airport, from the surface to 2,500 feet AGL
  2. 30 NM around a Class B primary airport, surface to 10,000 feet MSL
  3. Airspace within 5 NM of a Class C airport, from the surface to 4,000 feet AGL
  4. Airspace within 30 NM of any airport, from 10,000 feet MSL to FL 180
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Correct answer: 30 NM around a Class B primary airport, surface to 10,000 feet MSL

The Mode C veil covers the area within 30 NM of the listed airports, surface to 10,000 feet MSL.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 3-2-3 Class B Airspace — Mode C Veil, page 180

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Questions last reviewed: 18 October 2026