What type of runways use Medium Intensity Runway Edge Lights (MIRL)?

Medium Intensity Runway Edge Lights (MIRL) are used on specific types of runways based on visibility and operational requirements. The correct choice indicates that MIRL are utilized on Visual Flight Rules (VFR) runways as well as runways that accommodate non-precision Instrument Flight Rules (IFR) procedures. These types of runways do not support precision approaches, which typically require more advanced lighting systems for higher visibility and guidance, such as High-Intensity Runway Edge Lights (HIRL).

Understanding the operational context of MIRLs highlights their purpose. They are designed to provide adequate lighting for pilots during takeoff and landing operations under VFR conditions and during non-precision approach operations, where the precision of landing guidance is less critical than it would be for precision approaches used in low visibility conditions.

This aligns with aviation safety regulations and standards, ensuring that the proper lighting system is applied based on the runway's designated use and the expected flight operations conducted there.