Indicated Airspeed (IAS) is the speed shown on an aircraft's airspeed indicator. It measures the dynamic pressure of the air flowing over the aircraft's wings and is crucial for safe flight operations. IAS is essential for pilots to determine the aircraft's performance, including takeoff and landing speeds. IAS is not the same as true airspeed, which accounts for altitude and temperature. Pilots rely on IAS to ensure they remain within safe operating limits, especially during critical phases of flight. Understanding IAS helps pilots make informed decisions and maintain control of the aircraft during various flight conditions.