AirspaceQuestion 158 of 934

How far from the U.S. coast does a warning area begin?

  1. 12 nautical miles outward from the coast
  2. 1 nautical mile outward from the coast
  3. 25 nautical miles outward from the coast
  4. 3 nautical miles outward from the coast
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Correct answer: 3 nautical miles outward from the coast

A warning area extends from 3 NM outward from the coast. It may cover domestic or international waters.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 3-4-4 Warning Areas, page 191

Practice airspace

Questions last reviewed: 18 October 2026