RESUMO DIRETO
O que é ILS?
An ILS is a standard precision instrument approach system providing lateral runway centerline guidance (Localizer) and vertical glide path guidance (Glide Slope).
Significado: Instrument Landing SystemExplicação Técnica Completa
The Localizer operates on VHF (108.10 to 111.95 MHz) to provide azimuth runway alignment. The Glide Slope operates on paired UHF frequencies providing a standard 3-degree descent profile down to Decision Altitude (DA).