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mobile phone utility
use your moble phone to locate where other people with a mobile phone are located..view image on a map
Mobile phones can be programmed to display the location of any selected person on a map...so we just dial the number of another persons hand phone and their location will appear on a map on the phone screen
FRS/GMRS radio combined with GPS. When someone in your group keys up, their location shows up on the map display. [Baker^-1, Oct 04 2004]
but proximity alerts rather than a map. And I should also note prior by waugsqueke, since deleted. [DrCurry, Oct 04 2004]
But security added. [DrCurry, Oct 04 2004]
||Or you could ring them and ask.