Billions of dollars in government and private contracts ride on the conversion of the United States's air traffic control system to satellite-based GPS. — Reuters
SEATTLE: Inside the control tower at John F. Kennedy International Airport, air traffic controllers can track planes traveling hundreds of kilometres away.
But when it's time for a controller to hand off responsibility for watching a flight, the technology becomes decidedly last century: details are printed on a slip of paper and passed to a co-worker.
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