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Page last updated at 10:08 GMT, Tuesday, 8 March 2011

GPS 'vulnerable to jamming'

Has Britain become "dangerously dependent" on satellite navigation systems? The Royal Academy of Engineering has published a report warning that that an overdependence on GPS technology mean that, if the system were to fail, it could "just conceivably cause loss of life". Professor Martyn Thomas, who chairs the academy's GNSS working group, discusses his concerns.

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