What type of airspeed is directly read from the airspeed indicator?

Indicated airspeed is the type of airspeed that is directly read from the airspeed indicator. The airspeed indicator measures the dynamic pressure of the air flowing over the aircraft and converts it into a readable display. This measurement reflects the airspeed relative to the surrounding air and is crucial for various flight operations, such as determining stall speed and performance calculations.

True airspeed, on the other hand, is calculated based on indicated airspeed, adjusted for altitude and non-standard temperature. Calibrated airspeed is also a derived value that accounts for instrument and position error from the indicated airspeed. Ground speed reflects the speed of the aircraft relative to the ground and is affected by wind. While the indicated airspeed serves as a primary operational reference, the other types of airspeed provide important context and information that are derived from it.