It is hard to imagine how everyone, especially cachers, coped in a world without GPS. This cache is dedicated to those ancestors that relied upon the stars to navigate by.
Nearby is Clanfield Observatory, which holds public open evenings. It is well worth making the effort to go along at least once. To see a planet like Saturn, with its rings clearly visible through a large telescope, is a powerful spur to the imagination.
Here is a simple puzzle to solve:
Polaris has an apparent magnitude of A.BC
Polaris is DEF light years away from earth (based on the Hipparcos Stellar Parallax)
The coordinates you are looking for are N 50. 5(B-E). (F-A) B A W 001. 0A. D (C-A) (D+A) Where you will find a 2 litre container.
Try doing this one on a starry night! (Checksum of digits added together = 46)