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satellite navigation
Quiz any curmudgeon these days on the subject of proper wayfinding and you’ll soon find yourself reefed down in a gale of conventional wisdom about the importance of paper charts, compass bearings, dead reckoning, sextants, and the like. But what curmudgeons tend to forget, as they rail on about how modern nav tools are corrupting...
  Even as our nascent eLoran system is being shut down here in North America, concerns over the vulnerability of GPS and other sat-nav systems are growing elsewhere. Late last month in the U.K., at a symposium hosted by the Royal Institute of Navigation and the Digital Systems Knowledge Transfer Network, several scientists and engineers...

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