Radio communicationsQuestion 255 of 934

ATC says, "Squawk Mayday." Which transponder code should a civil pilot select?

  1. 7500
  2. 7700
  3. 7600
  4. 1200
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Correct answer: 7700

"Squawk Mayday" means operate in the emergency position, Mode A code 7700 for civil transponders.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 4-1-20 Transponder and ADS-B Out Operation — Cooperative Surveillance Phraseology, page 224

Practice radio communications

Questions last reviewed: 18 October 2026