ground con-trolled approaches

ground-controlled approach

noun Aeronautics.
a system in which an observer interprets radar observations of the position of an aircraft and transmits continuous instructions to its pilot for landing. Abbreviation: GCA
Also, ground-control approach.

1940–45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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ground-controlled approach

aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar 
WordNet® 3.0, © 2006 by Princeton University.
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