Editing Calibrated airspeed (section)

{{short description|Airspeed corrected for instrument and position error}}
{{More footnotes|date=September 2010}}

In [[aviation]], '''calibrated airspeed''' ('''CAS''') is indicated [[airspeed]] corrected for instrument and [[position error]].

When flying at [[sea level]] under [[International Standard Atmosphere]] conditions (15&nbsp;°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 [[Knot (unit)|knots]] is usually abbreviated as ''KCAS'', while indicated airspeed is abbreviated as ''KIAS''.

In some applications, notably British usage, the expression ''rectified airspeed'' is used instead of calibrated airspeed.<ref>Clancy, L. J. (1975) ''Aerodynamics'', pp 31, 32. Pitman Publishing Limited, London. {{ISBN|0 273 01120 0}}</ref>