Aircraft systems and instrumentsQuestion 532 of 934

What is groundspeed?

  1. CAS corrected for temperature
  2. TAS adjusted for wind
  3. IAS corrected for altitude
  4. The speed shown by the airspeed indicator
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Correct answer: TAS adjusted for wind

Groundspeed is TAS adjusted for wind. It decreases with a headwind and increases with a tailwind.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 8: Flight Instruments — Airspeed Indicator (ASI), page 211

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Questions last reviewed: 18 October 2026