NavigationQuestion 273 of 934

Along which line do true north and magnetic north coincide?

  1. The isogonic line
  2. The prime meridian
  3. The agonic line
  4. The compass rose
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Correct answer: The agonic line

Zero variation exists on the agonic line, where magnetic north and true north coincide.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 16: Navigation — Magnetic Variation, page 394

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Questions last reviewed: 18 October 2026