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European Global Navigation Satellite System

I agree that airline pilots can navigate, but I would stress the huge importance of maintaining the accuracy of GPS. To provide an example, there was a very slight glitch in one of the GPS satellites a short time ago when one of the timers went wrong. The result was that 10 per cent. of mobile phones on the west coast of the US went down. It is thus enormously important for the United States to keep GPS accurate. The economic consequences are huge, as I shall explain in more detail later.