The cache is NOT located at the posted coordinates, but it is within two miles. Solve the puzzle to find the final location. This cache is an addition to the series of puzzle caches, one for each letter of the alphabet. This is the second X puzzle as the first has proved to be quite challenging. See the bookmark list for other caches in this series!
X (second try) is for X-ray. This puzzle involves these electromagnetic waves used in medical imaging, among other things. N 40º and W 85º are implied; the rest must be deciphered below. Good luck!
The puzzle:
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certitude.