Commercial Pilot License (CPL) Practice Exam 2025 - Free Commercial Pilot License Practice Questions and Study Guide

The green arc on the airspeed indicator signifies the normal operating range for the aircraft. Within this range, the aircraft can be safely operated without exceeding parameters that might affect its flight characteristics or structural integrity. Specifically, this arc indicates the speeds at which the aircraft can be flown for normal operations, such as takeoff, cruising, and landing, while ensuring stability and control.

The boundaries of this green arc are determined by the aircraft's performance data, identifying speeds that should be maintained during typical flight operations in order to optimize safety and efficiency. Operating outside of this range—below or above it—can lead to unsafe conditions, such as stalling (if under the lower limit) or structural failure (if exceeding the upper limit).

Understanding the significance of the green arc is vital for pilots to ensure safe and confident flight operations.