London Guardian 
Wednesday, May 20, 2009
It has become one of the staples of modern, hi-tech life: using satellite navigation tools built into your car or mobile phone to find your way from A to B. But experts have warned that the system may be close to breakdown.
US government officials are concerned that the quality of the Global Positioning System (GPS) could begin to deteriorate as early as next year, resulting in regular blackouts and failures – or even dishing out inaccurate directions to millions of people worldwide.
The warning centres on the network of GPS satellites that constantly orbit the planet and beam signals back to the ground that help pinpoint your position on the Earth’s surface.
(ARTICLE CONTINUES BELOW)
The satellites are overseen by the US Air Force, which has maintained the GPS network since the early 1990s. According to a study by the US government accountability office (GAO), mismanagement and a lack of investment means that some of the crucial GPS satellites could begin to fail as early as next year.
“It is uncertain whether the Air Force will be able to acquire new satellites in time to maintain current GPS service without interruption,” said the report, presented to Congress. “If not, some military operations and some civilian users could be adversely affected.”