Plain English Meaning

It is a navigation signal that works like the side-to-side guidance part of an ILS, but the signal is not lined up straight down the runway. So it gets you close to the airport on a known track, but you usually have to maneuver visually to land.

Full Definition

A ground-based instrument approach navigation aid that transmits a localizer-type signal of comparable accuracy to an ILS localizer, but is not aligned with the runway centerline. Because of its offset alignment, an LDA approach is not classified as a precision approach and typically does not provide electronic glide slope guidance.

Context Anchor

You will see on and in when flying in or .