The given coordinates are NOT for the cache.
This is the final bonus cache of the CMS. You need to complete 4 caches to locate this using the clues gained.
The difficulty of this is such because of the average difficulty of all the others.
Final Cache when all completed is at
N51 09.(A+60) W000 08.(D+230+F)
Good luck!
The other caches in the series are
CMS 1
CMS 3
CMS 4