In aviation a ground-controlled approach (GCA), is a type of service provided by air-traffic controllers whereby they guide aircraft to a safe landing, including in adverse weather conditions, based on primary radar images. Most commonly a GCA uses information from either a Precision Approach Radar (PAR, for precision approaches with vertical, gli...
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http://en.wikipedia.org/wiki/Ground-controlled_approach
(from the article `flight, history of`) ...cathode-ray display were for military purposes (detecting incoming enemy aircraft), it was soon applied to in-flight navigation, controlling ... ...as were short-range navigational systems, called shoran. Combinations of radar and communications for the landing of aircraft in zero visibility .....
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http://www.britannica.com/eb/a-z/g/74
[
n] - aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar
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http://www.webdictionary.co.uk/definition.php?query=ground-controlled%20app
GCA noun aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar
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https://www.encyclo.co.uk/local/20974
No exact match found.
