Scientists build better navigation aids

(AP) -- Satellite-based navigation gadgets can guide motorists from high above, saving bumbling drivers countless hours and extra trips to the gas station. But directing people on a much smaller scale - such as inside an office - is a much greater challenge.

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<p><a href="http://www.physorg.com/news79625083.html">Scientists build better navigation aids</a></p> <p>(AP) -- Satellite-based navigation gadgets can guide motorists from high above, saving bumbling drivers countless hours and extra trips to the gas station. But directing people on a much smaller scale - such as inside an office - is a much greater challenge.</p>