FAA L-859 omnidirectional approach lighting system (ODAL)
FAA AC 150/5345-51B outlines four types and six styles of flashing light equipment for use as runway end identification lights and omnidirectional approach lighting systems (ODALs).
L-849V – REIL lights powered by airport voltage power source
L-849I – REIL lights powered by constant current 6.6 A power supply
L-859V – ODALS powered by airport voltage power source
L-859I – ODALS powered by constant current 6.6 A power supply
A – Unidirectional, high intensity, one brightness step.
B – Omni-directional, high intensity, one brightness step.
C – Unidirectional, low intensity, one brightness step.
D – Omni-directional, low intensity, one brightness step.
E – Unidirectional, three brightness steps.
F – Omni-directional, three brightness steps.
Note: All styles apply to an L-849, only Style F applies to L-859
Effective Intensity by Style
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