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Web Site    http://www.survivalprimer.com/
Survival    http://www.survivalprimer.com/Index_Survival.htm
Christian   http://www.survivalprimer.com/index_spiritual.htm
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not original to above site

Compass, Navigation, Offset Technique, Boyscout Book

Offset Technique
     Experienced backcountry travelers know that even a slight error
in taking and following compass bearings can throw them quite a
distance off their intended courses.  One way to be sure you'll reach
your destination is to aim intentionally for a point to the left or
the right of it, and then follow natural features known as backstops
to it.
     For instance, assume the lake you want to reach is very small,
but on the map you notice that a creek flows from it to the left,
perpendicular to your line of travel.  Rather than take a bearing on
the lake itself and risk missing it altogether by passing too far to
the right, aim for a point on the creek a few hundred yards below the
lake.  When you reach the creek anywhere along its length, all you
need to do is follow it upstream until you reach the lake.  Streams,
power lines, fences, drainage ditches, trails and ridges all make good
backstops and guidelines.