True Airspeed

The true airspeed (TAS; also KTAS, for knots true airspeed) of an aircraft is the speed of the aircraft relative to the airmass in which it is flying. The true airspeed is important information for accurate navigation of an aircraft.

Read more about True Airspeed:  Performance, Airspeed Sensing Errors, Use in Navigation Calculations

Famous quotes containing the word true:

    Whatever does not spring from a man’s free choice, or is only the result of instruction and guidance, does not enter into his very being, but still remains alien to his true nature; he does not perform it with truly human energies, but merely with mechanical exactness.
    Karl Wilhelm Von Humboldt (1767–1835)