Omnidirectional Approach Lighting System

This system is a configuration of seven omnidirectional, variable- intensity, sequenced flashing lights. An ODALS provides circling, offset, and straight-in visual guidance for non-precision approach runways. There are five lights on the extended centreline commencing 90 metres from the threshold and spaced 90 metres apart over a total distance of 450 metres. Two lights are positioned 12 metres to the left and right of the threshold. The system flashes towards the threshold, then the two threshold lights flash in unison; the cycle repeats once per second.