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Radio communicationsQuestion 245 of 934

Why should a pilot listen before keying the transmitter?

  1. The controller cannot hear calls made within 5 seconds of each other
  2. The radio automatically cancels a call made during another call
  3. ATC records only the first call on each frequency
  4. Two calls at once can block both, so each must be repeated
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Correct answer: Two calls at once can block both, so each must be repeated

If you hear someone else talking, keying your transmitter is futile and will probably jam their receivers.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 4-2-2 Radio Technique, page 227

Practice radio communications

Questions last reviewed: 18 October 2026