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Technology for its own sake?
"Tim" wrote in message .. .
On Thu, 23 Sep 2004 15:57:55 +0000, Peter Masson wrote: (Can GPS identify which line the train is on if adjoining platforms are different lengths?) Not with any certainty. Of course, what happens if the Pentagon decided to turn off GPS for civilian use without warning (which they've always stated they have the right to do)? Or worse, they have a war and introduce deliberate errors into the system designed to confuse the enemy? Never mind that , GPS is easily blocked by obstructions such as trees , embankments , bridges etc. And as for tunnels... Still , on the bright side that means LU won't be using it for the doors anytime soon B2003 |
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