ICAO TLOF

If a heliport is used at night, employ a TLOF lighting system consisting of green omnidirectional perimeter lights.

The TLOF lighting system for a surface-level heliport or helideck may consist of:

• Perimeter lights
• Floodlighting
• Arrays of segmented point source lighting (ASPSL) or luminescent panel (LP) lighting to identify the TLOF when perimeter or floor lights aren’t practical and FATO lights are available.

The TLOF lighting system for an elevated heliport or helideck may consist of:

• Perimeter lights
• ASPSL and/or LPs to identify the touchdown marking and/or floodlighting to illuminate the TLOF.

Place TLOF perimeter lights along the edge of the TLOF or within 1.5 m from the edge. They should be uniformly spaced at 3 m maximum intervals m for elevated heliports and helidecks and no more than 5 m for surface-level heliports. There shall be a minimum number of 4 lights on each side including a light at each corner. A minimum of 14 lights is required for a circular TLOF.