##### Calibrated Airspeed (CAS) Calibrated airspeed (CAS) is [[IAS|indicated air speed]]  corrected for instrument and position error. When flying at [[MSL|sea level]] under [[ISA|International Standard Atmosphere]] conditions (15 °C, 1013 hPa, 0% humidity) calibrated airspeed is the same as equivalent airspeed ([[EAS]]) and true airspeed ([[TAS]]). If there is no wind it is also the same as ground speed ([[GS]]). Under any other conditions, CAS may differ from the aircraft's TAS and GS. Calibrated airspeed in knots is usually abbreviated as KCAS, while indicated airspeed is abbreviated as KIAS. >Covered in: >Mentioned in: >References: [[WP CAS|🌍]] >Required by: > >Related to: