What are the two types of airspeeds commonly referenced by pilots?

Pilots typically refer to Indicated Airspeed and True Airspeed as the two primary types of airspeeds in aviation. Indicated Airspeed is the speed that the aircraft's airspeed indicator displays, which is obtained from the pitot-static system. This measurement is crucial during the flight for taxiing, takeoff, and landing, as it is a direct reference for the aircraft's performance in the air.

True Airspeed, on the other hand, accounts for the effects of altitude and temperature on air density. It reflects the actual speed of the aircraft relative to the surrounding air and is important for navigation and fuel planning, especially at higher altitudes where the indicated airspeed can vary from the true airspeed due to thinner air.

Understanding both of these speeds is essential for pilots, as Indicated Airspeed relates directly to the aircraft's aerodynamic performance while True Airspeed provides a more accurate measure for navigation and operational planning. These two types are fundamental for safe flight operations and effective communication within the aviation community.