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

Question: 1 / 550

What color light indicates that an aircraft is below the flight path in a Tri-color VASI system?

Green

Amber

White

Red

In a Tri-color VASI (Visual Approach Slope Indicator) system, the color red indicates that an aircraft is below the desired flight path. This system is designed to provide visual guidance to pilots during the approach phase of landing. When the pilot sees a red light, it serves as a warning that they need to ascend to reach the correct glide slope, ensuring a safe landing approach. The other colors in the system, such as green, would indicate that the aircraft is on the correct glide path, while other hues like amber may signal caution or a need for further attention. Thus, the red light is crucial for alerting pilots to correct their altitude during landing approaches.

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