Plain English Meaning

An approach where the GPS-based system guides the airplane both side-to-side toward the runway and up-and-down along a descent path. Instead of stepping down to a flat minimum altitude, the pilot follows a smooth glide path down to a decision altitude, where they either see the runway and land or go around.

Full Definition

An instrument approach service that provides both horizontal (lateral) course guidance and vertical descent guidance to a runway, using satellite-based navigation systems with augmentation that meets and for . publish a Decision Altitude (DA) rather than a (), and the vertical path is computed by the 's or generated by (such as ).