Aviation World on Instagram: "An Approach Lighting System (ALS) in aviation consists of a set of lights positioned near the runway to help pilots visually locate and align with the runway during the final stages of their approach, especially in low-visibility situations (e.g., night flights, fog, or adverse weather). The ALS is essential for guiding pilots as they shift from instrument-based navigation (like ILS or GPS) to visual alignment with the runway. Key Components of an Approach Lighting