| When people
think of instruments that help with direction finding,
the first one that comes to mind is probably the
magnetic compass. It is the oldest instrument for
navigation and has been a vital tool for navigators at
sea for centuries.
No matter where you
stand on earth you can hold a compass in your hand and
it will point toward the north pole. What an
unbelievably neat and amazing thing! Imagine that you
are in the middle of the ocean, and you are looking all
around you in every direction and all you can see is
water, and it is overcast so you cannot see the sun...
how in the world would you know which way to go unless
you had a compass that told you which way is
"up"?
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