What does ALS stand for in aviation terminology?

In aviation terminology, ALS stands for Approach Lighting System. This system is crucial as it provides visual cues to pilots on their final approach to land. The Approach Lighting System is designed to enhance the pilot's ability to identify the runway environment under various visibility conditions, especially during night landings or in reduced visibility environments. The layout typically features a series of lights positioned along the extended centerline of the runway to guide pilots during the landing phase, ensuring safety and precision.

The importance of the ALS cannot be overstated, as it assists in reducing the decision height where a pilot must make visual contact with the runway to continue the approach safely. Understanding the function and significance of the Approach Lighting System is vital for dispatchers and pilots alike, as it directly impacts flight safety and efficiency during landing operations.