In July last year, problems with
the existing European AIR TRAFFIC CONTROL system were highlighted by the
tragic death of 71 people, including 50 school children. The processing of
extensive radar and other aircraft input information for European air space
is a very big challenge, requiring a reliable system to warn air traffic
controllers of impending disaster. So why has Ivor Catt's computer solution
for Air Traffic Control been ignored by the authorities for 13 years? Nigel Cook reports.
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