An '''Airair Datadata Inertialinertial Referencereference Unitunit''' (ADIRU) is a key component of the integrated '''Airair Datadata Inertialinertial Referencereference Systemsystem''' (ADIRS), which supplies air data ([[airspeed]], [[angle of attack]] and [[altitude]]) and [[Inertial navigation system|inertial reference]] (position and altitude) information to the pilots' [[electronic flight instrument system]] displays as well as other systems on the aircraft such as the engines, [[autopilot]], [[aircraft flight control system]] and landing gear systems.<ref name="art5">
