What color identifies the normal airspeed operating range?

The normal airspeed operating range is identified by the green arc on an aircraft's airspeed indicator. This green arc represents the speeds within which the aircraft can safely operate under normal conditions. It includes the stall speed and the maximum cruising speed, allowing pilots to maintain performance and safety while flying.

Understanding the significance of the green arc is crucial for pilots, as flying within this range helps ensure control during various phases of flight, such as takeoff, climb, cruise, and landing. Exceeding this range or flying below the stall speed can lead to potential handling issues or unsafe conditions. Hence, pilots closely monitor this indicator to maintain safe and effective flight operations.