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Decision making and flight planningQuestion 782 of 934

For how long will an ELT operate continuously after activation?

  1. At least 12 hours
  2. At least 24 hours
  3. At least 72 hours
  4. At least 48 hours
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Correct answer: At least 48 hours

The transmitters operate continuously for at least 48 hours over a wide temperature range.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 6-2-4 Emergency Locator Transmitter (ELT), page 489

Practice decision making and flight planning

Questions last reviewed: 18 October 2026