ILS localiser coverage

3D ModelNoAI

The localiser is part of an Instrument Landing System (ILS) and is used by pilots to guide an aircraft during final approach. It provides lateral guidance helping to align an aircraft with the runway centreline.

Localisers emit a highly directional radio signal transmitted from a fixed antenna system, a sample profile of which is shown. The protected zone is also visible. This defines an area which is free from lateral lobe interference of side lobes - ILS guidance should not be enabled outside of this zone.

This model shows a general overview of localiser coverage, rather than any specific airport installation. Individual setups will typically be determined by the local authorities. An area of London is displayed only to provide a general sense of scale.

Learn more about ILS localiser coverage.

Surface texture copyright Mapbox and OpenStreetMap.