Medium Intensity Approach Light System with Runway Alignment Indicator Lights (MALSR)
Medium Intensity Approach Light System with Runway Alignment Indicator Lights (MALSR)
Definition
Medium Intensity Approach Light System with Runway Alignment Indicator Lights
Description
MALSR is a medium-intensity approach lighting system installed along the extended runway centreline. It provide visual information on runway alignment, height perception, roll guidance, and horizontal references to support the visual portion of an instrument approach.
The MALSR system consists of three elements:
- Threshold lights. This consists of 18 to 33 aviation green steady burning lights (depending on runway width).
- Steady burning lights. These form an array of nine sets (called light bars), each consisting of five aviation white steady burning lights. Seven of the light bars are located at 200 ft intervals along the extended runway centreline and the other two are offset to the left and right of the extended centreline at the 1000 ft bar.
- Sequenced flasher. This is an array of five white flashing lamps located at 200 ft intervals starting 200 ft beyond the last light bar. The collective flashing of all lights in the array gives the appearance of a ball of light traveling toward the runway.
CopyrightSKYbrary
MALSR elements layout.
CopyrightFAA
MALSR from a landing aircraft point of view.
Further Reading
Categories
