Needless to say the cache is not at the published co-ordinates. Like a lot of other puzzle caches around here it might be a mystery to you; let the game commence.
Consider the following pictures, then find the cache at
N 51 0 (E-F-C) . A (F+D) (B-F) W 000 5 (G/D) . (G-F-F) (E-C+D) F
You can check your solution here