Which of the following represents the four types of airspeed?

The four fundamental types of airspeed in aviation are Indicated, Calibrated, Equivalent, and True airspeed. Each type serves a specific purpose in flight operations.

Indicated airspeed is the speed shown on the aircraft's airspeed indicator and is directly measured from the pitot-static system. It is important for pilot awareness and operational safety, as it indicates how the aircraft is responding under specific conditions.

Calibrated airspeed is the indicated airspeed corrected for instrument and position errors. This adjustment ensures that the reading truly reflects the aircraft's performance, allowing pilots to make more accurate estimations of speed during flight.

Equivalent airspeed accounts for compressibility effects at higher speeds. It reflects the airspeed at which the aircraft would experience the same dynamic pressure as the actual airspeed at a standard temperature and pressure. This is particularly important in high-performance aircraft operating at high altitudes and speeds.

True airspeed is the actual speed of the aircraft relative to the surrounding air mass. It is derived from calibrated airspeed adjusted for altitude and temperature, providing pilots with the necessary information for navigation, fuel planning, and understanding aerodynamic performance.

Understanding these types of airspeed is critical for effective flight planning and safety, as they give pilots the necessary data to