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AirspaceQuestion 145 of 934

Unless ATC authorizes otherwise, which equipment must an airplane have to enter Class D airspace?

  1. An operable two-way radio and a Mode C transponder
  2. An operable transponder with ADS-B Out only
  3. An operable VOR receiver and a two-way radio
  4. An operable two-way radio
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Correct answer: An operable two-way radio

Class D needs a two-way radio. The text lists no transponder requirement for Class D itself.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 3-2-5 Class D Airspace — Equipment, page 186

Practice airspace

Questions last reviewed: 18 October 2026