"A relic of older conflicts, this base was reactivated after the New Mombasa Slipspace Event."
So, you should have gotten two letters (N and W), two decimal points, and six numbers (one letter, one decimal point, and three numbers from each cache, respectively). Figure out which number goes with which coordinate, and add or subtract to figure out the true coordinate.
You can check your answers for this puzzle on GeoChecker.com.
Due to a number of factors, this cache will no longer require you to solve a puzzle. Actual coordinates are the final coordinates. N 43° 03.077 W 070° 43.247
Update 1/27/2017: Cache has been replaced by GemHunters and is now smaller and a bit more difficult than before.
Good luck and good hunting!