For this reason, they can recognise that they are flying too high for the runway approach.īelow the glide slope will instead show more red lights than white.
Reading PAPI lightsįrom the cockpit, a PAPI is seen as a series of white and red lights, with the proportion of each indicating the current angle.Ībove the designed glide slope for the runway, the pilot will see more white lights than red. These systems are usually located on the left-hand side of a runway around 300 metres beyond the start of the runway. What are PAPI lights?Ī PAPI (Precision Approach Path Indicator) is a ground-based visual aid that provides guidance to pilots of their vertical position relative to an airport’s runway. Systems Interface provides cable-free, solar-powered PAPIs for a wide range of deployments.
