GCA

aircraft landing in stormy weather in which the pilot is provided with precise guidance for the final approach in landing using surveillance precision approach radar

The word GCA has more than one meaning:GAC Corporate Academy - the global learning arm of Gulf Agency CompanyGothenburg City Airport - a city airport in western SwedenGovernment College of Architecture, Lucknow, India.Giant cell arteritis - a form of vasculitisGCA - a data file formatGun Control Act - Gun Control Act of 1968 Golf Course Architecture - Popular Golf magazineGreat Commission Association - Association of evangelical Christian churchesGeorgia-Cumberland Academy - a Seventh-day Adventist private high school in the U.S. state of GeorgiaGround-controlled approach - A precision radar-system based aircraft guiding procedure for blind landing. in use till middle/end 1970.
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Noun
1. aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar
(synonym) ground-controlled approach
(hypernym) aircraft landing, airplane landing

(See also Airport Surveillance Radar, Precision Approach Radar) A radar approach system operated from the ground by air traffic control personnel transmitting instructions to the pilot by radio. The approach may be conducted with airport surveillance radar (ASR) only or with both surveillance and precision approach radar (PAR). Usage of the term "GCA" by pilots is discouraged except when referring to a Ground Controlled Approach (GCA) facility. Pilots should specifically request a "PAR" approach when a precision radar approach is desired or request an "ASR" or "surveillance" approach when a nonprecision radar approach is desired. (FAA4)

Ground Control Approach