Global Positioning System Devices
CREDIT: ESA.

 
The Enterprise's transporter was able to zero in on the exact location of an individual crew member from thousands of miles away. Although we're still working on teleportation (see USAF Looks Into Teleportation), we've pretty much got the location technology down pat. It's called the Global Positioning System - GPS. One such satellite, one of Europe's planned Galileo network, is shown above.
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