What is MALSR and its role?

• A. Major Lighting System for Runway Slope Regulation; controls descent angle.
• B. Minimal Approach Lighting System with Runway Alignment; provides visual cues for non-precision.
• C. Medium-Intensity Approach Lighting System with Runway Alignment; supports precision approach visibility.
• D. Meteorological Advisory Light System for Runway; displays visibility information.

Answer: (C)

MALSR is an approach lighting system that uses medium-intensity lights along the approach path and includes Runway Alignment Indicator Lights (RAIL) to help the pilot stay centered on the runway.

Its role is to provide clear visual cues during the approach and late descent, especially in instrument conditions, so the pilot can judge distance to the runway and ensure proper alignment with the runway centerline. The system bridges the gap between basic approach lighting and more extensive precision-approach lighting, giving enough visual reference to support a precision-like approach under limited visibility. It is not a weather display system and is not about controlling descent angle or providing minimal lighting.