Aircraft systems and instrumentsQuestion 535 of 934

What does the yellow arc on the airspeed indicator mean?

  1. Normal operating range, any air
  2. Flap operating range, any air
  3. Best angle of climb speed range
  4. Caution range, smooth air only
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Correct answer: Caution range, smooth air only

The yellow arc is between VNO and VNE.

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

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026