Start your search at the posted coordinates. There you will find
the cannon that launched the cache. The cannon will tell you all
you need to work out where the cache can be found.
First, you'll need to measure the angle the cannon is pointing.
When you measure the angle, round it to the nearest 5°.
Next, you'll want to know the velocity the cache left the cannon
at. You will notice three numbers engraved on the first reinforce
of the cannon. The numbers are in the form A-B-C. This will tell
you the cache's initial velocity (in m/s) was:
(A×A) + B + (C×C)
Finally, you'll have to determine the direction the canon was
pointing when the cache was launched. You could use a compass to
determine the direction the cannon is pointing, but to ensure
you've got it correct (big iron cannons can mess up magnetic
compasses,) use the engraved numbers to determine the direction the
cache was fired (in whole degrees) was:
(((C×C)-B)×A)+C
Assume that no obstacles blocked the flight of the cache and
that the altitude of the cannon and the area where the cache landed
is the same. Assume the cache gave no air resistance. Assume the
cache stayed where it landed, without bouncing further.
You should be able to use your brain and your GPS to determine
where the cache can be found!
Check your solution.