What is MALSR, and what problem does it solve for instrument approaches?

• A. MALSR stands for Medium-intensity Approach Lighting System with Runway Alignment Indicator Lights; provides a defined visual cue during instrument approaches.
• B. MALSR stands for Manual Approach Lighting and Runway Signals; used for maintenance and test flights.
• C. MALSR stands for Multi-Azimuth Lighting System for Runways; used for crosswind operations.
• D. MALSR stands for Medium-Altitude Landing and Runway Signals; used for altitude measurement.

Answer: (A)

MALSR stands for Medium-intensity Approach Lighting System with Runway Alignment Indicator Lights. This system creates a clearly lit path from the approach end of the runway to the runway surface, giving pilots a reliable visual cue during instrument approaches in low visibility. The Runway Alignment Indicator Lights installed as part of MALSR help the pilot discern whether they’re properly aligned with the runway centerline and know when the runway environment is in sight. By providing these external visual references, MALSR reduces the ambiguity that can come with instrument-only approaches and supports a safe, stabilized descent to landing. The other options don’t fit because they describe functions or purposes that aren’t part of this lighting system (maintenance/test use, crosswind-specific lighting, or altitude measurement).