Which airspeed is calculated after accounting for mechanical and position errors?

Calibrated airspeed is the airspeed that has been adjusted for both mechanical and position errors associated with the aircraft's airspeed measurement system. Indicated airspeed arises directly from the airspeed indicator readings, which can be affected by errors due to instrument inaccuracies or the placement of the pitot tube.

Calibrated airspeed represents a more accurate measure because it takes these errors into account, ensuring that pilots have a better understanding of their true performance characteristics relative to the aircraft's standard operating conditions. The process of obtaining calibrated airspeed involves corrections to the indicated airspeed based on specific calibration procedures set by the aircraft manufacturer.

Equivalent airspeed and true airspeed differ from calibrated airspeed as they account for other factors. Equivalent airspeed considers compressibility effects at higher speeds, while true airspeed accounts for altitude and temperature variations while relating to the actual speed of the aircraft through the air. Therefore, calibrated airspeed is the correct choice for an airspeed measurement that includes adjustments for the various errors.