What is indicated by a speed in the green arc on the airspeed indicator?

The speed displayed in the green arc on the airspeed indicator represents the operating range of the aircraft. This range indicates the speeds at which the aircraft can be safely flown without risking aerodynamic issues, ensuring that the pilot is operating within safe parameters for normal flight. The green arc typically encompasses the speeds needed for normal maneuvers, including climbs and descents, and is designed to help pilots make informed decisions while operating the aircraft.

In contrast, other segments of the airspeed indicator represent differing conditions; for example, the yellow arc indicates cautionary speeds, while the red radial line signifies the aircraft's maximum airspeed. Understanding these segments, particularly the green arc, is crucial for safe flying and compliance with operational guidelines.