Poor Man's GPS
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Owner:
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numbknuckle
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Released:
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Wednesday, June 25, 2008
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Origin:
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California, United States
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Recently Spotted:
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In All Dogs Go to Heaven (YGR1506)
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My first TB: After years of adventure, Poor Man's GPS would like to return home. Please help PMG get to Orange County, in Southern California.
Poor Man's GPS wants to navigate home.
The earths electromagnetic field spins the compass needle, making it point north.
The simplest way of using a compass is to know that the arrow always points in the same direction, magnetic North, which is roughly similar to true north. Except in areas of extreme magnetic declination variance (20 degrees or more), this is enough to protect from walking in a substantially different or even opposite direction than expected over short distances, provided the terrain is fairly flat and visibility is not impaired. In fact, by carefully recording distances (time or paces) and magnetic bearings traveled, one can plot a course and return to one's starting point using the compass alone.
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