Calibrated Airspeed is indicated airspeed corrected for which errors?

• A. Altitude and temperature
• B. Instrument and position error
• C. Density and humidity effects
• D. Wind and turbulence

Answer: (B)

Calibrated Airspeed accounts for inaccuracies in the airspeed indication by correcting two specific errors in the pitot-static system: instrument error, which are the inherent inaccuracies of the airspeed indicator itself, and position error, which come from how the pitot tube and static ports are installed and placed on the aircraft. Correcting these biases makes the reading more representative of the true dynamic pressure the aircraft experiences, without the distortions caused by the instrument or its installation. The other factors listed aren’t part of this correction: altitude and temperature are used later to derive True Airspeed from CAS; density and humidity effects aren’t treated in this correction; and wind or turbulence affect ground speed or instantaneous flight conditions rather than the calibrated reading from the airspeed indicator.