In an Instrument Landing System, which component provides lateral guidance to the runway centerline?

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Multiple Choice

In an Instrument Landing System, which component provides lateral guidance to the runway centerline?

Lateral guidance along the runway centerline in an Instrument Landing System is provided by the localizer. The localizer transmits a signal that defines a course aligned with the runway centerline, and your instruments show whether you are left or right of that centerline so you can steer to stay centered. The glide slope provides vertical guidance, helping you stay on the proper descent path. Marker beacons give distance and position cues along the approach (outer, middle, inner markers) but do not steer you laterally. Approach lighting assists in visually acquiring the runway environment, not in lateral alignment. So, the component that keeps you centered on the runway is the localizer.

Lateral guidance along the runway centerline in an Instrument Landing System is provided by the localizer. The localizer transmits a signal that defines a course aligned with the runway centerline, and your instruments show whether you are left or right of that centerline so you can steer to stay centered.

The glide slope provides vertical guidance, helping you stay on the proper descent path. Marker beacons give distance and position cues along the approach (outer, middle, inner markers) but do not steer you laterally. Approach lighting assists in visually acquiring the runway environment, not in lateral alignment.

So, the component that keeps you centered on the runway is the localizer.

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