ALS stands for what?

ALS stands for what?

• A. Aircraft Landing System
• B. Alarm Load System
• C. Approach Lighting System
• D. Auxiliary Lighting Suite

Answer: (C)

Approach Lighting System is a structured array of runway lights that extends outward from the threshold to give pilots clear visual cues for alignment and descent during the final approach, especially in reduced visibility. That’s why this option is the best answer: it’s the standard term used for the lighting setup that aids visually during the approach. The other terms aren’t standard aviation terminology for this purpose—Aircraft Landing System, Alarm Load System, and Auxiliary Lighting Suite don’t refer to the runway lighting configuration used to guide an approach. The ALS enhances depth perception and runway alignment, often working alongside navigation aids like the ILS, but it does not provide radio navigation guidance itself.

Approach Lighting System is a structured array of runway lights that extends outward from the threshold to give pilots clear visual cues for alignment and descent during the final approach, especially in reduced visibility. That’s why this option is the best answer: it’s the standard term used for the lighting setup that aids visually during the approach. The other terms aren’t standard aviation terminology for this purpose—Aircraft Landing System, Alarm Load System, and Auxiliary Lighting Suite don’t refer to the runway lighting configuration used to guide an approach. The ALS enhances depth perception and runway alignment, often working alongside navigation aids like the ILS, but it does not provide radio navigation guidance itself.