ground-controlled approach: Meaning and Definition of

ground'-con•trolled approach"

Pronunciation: (ground'kun-trōld"), [key]
— Aeron. Aeron.
  1. a system in which an observer interprets radar observations of the position of an aircraft and transmits continuous instructions to its pilot for landing. Abbr.: GCA&hasp;
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.