MALSF

The Medium Intensity Approach Lighting System with Sequenced Flashing Lights (MALSF) system consists of seven barrettes of variable-intensity lights spaced 60 metres apart, commencing 60 metres from the threshold, over a distance of 420 metres. In a MALSF, the three barrettes farthest away from the threshold contain a sequenced flashing light unit. These lights flash sequentially towards the threshold, repeating at two cycles per second.