This is the Bonus for the nearby Lab Caches 'Farnborough in Flight', so you will have to obtain the informations from the Lab Caches to enable you to find this cache. The formula to enable you to work out the finals is below, Good Luck.
The Finals are at -
N51 17.(D - C - A)(E - D - A)(B) W000 44. (E + C)(C - A)( D + A)