Which type of airspeed is obtained after correcting indicated airspeed for instrument and position errors?

• A. Indicated Airspeed
• B. True Airspeed
• C. Density Airspeed
• D. Calibrated Airspeed

Answer: (D)

The main idea is that airspeed readings are refined by removing errors introduced by the instruments and their installation. An airspeed indicator shows Indicated Airspeed, which includes instrument and position errors. Correcting for those errors yields Calibrated Airspeed, the speed value that accounts for those measurement biases. So Calibrated Airspeed is the speed you get after adjusting IAS for instrument and position errors.

To connect the others: Indicated Airspeed is the raw, uncorrected reading. True Airspeed is CAS further corrected for air density (altitude and temperature) to reflect actual motion through the air. Density Airspeed isn’t a standard term used in aviation practice.