NavigationQuestion 298 of 934

A lost pilot's situation becomes threatening. Which emergency frequency should the pilot use?

  1. 108.0 MHz
  2. 118.0 MHz
  3. 121.5 MHz
  4. 122.8 MHz
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Correct answer: 121.5 MHz

The pilot transmits the situation on 121.5 MHz. Most facilities and even airliners monitor it.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 16: Navigation — Lost Procedures, page 421

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Questions last reviewed: 18 October 2026