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Used Load Stones ( a mineral composed of iron oxidde) to construct their fortune telling boards, someone pointed out that the loadstones wer better at pointing out real directions, that lead to the first compass.
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Compasses were likely used as backups for when the sun & stars or other landmarks could not be seen.
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was used to Navigate where you are north, south, east, west.
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The GPS was invented to help you with location and to know where you are.
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Was used for a GPS to naviage
