Gauteng West Rand Black Eagle GeoArt Series

Welcome to the West Rand, Gauteng!
The West Rand geocaching community is very proud to present BLACK EAGLE GEOART, the only GeoArt series to date in South Africa depicting the rare Black Eagle!
Apart from its rich cultural history, the West Rand in Gauteng, South Africa is also home to an extremely active geocaching community. The West Rand geocachers are a social bunch and meet at least once every month to share stories, swap experiences and trackables and enjoy each other's company.
We hope you will enjoy exploring the beauty of the West Rand, Gauteng!
The cache is not at the listed coordinates. In order to obtain the final coordinates, you will have to solve the puzzle:
The coordinates of this cache were stored on a GPS that gave some weird errors. It saved the correct coordinates, but before I could copy it, it started flashing and every time it flashed, showed some random values.
I did manage to get these flashed coords written down:
| Original coordinates: |
S26 ??.??? E027 ??.??? |
| 1st flash: |
S26 57.612 E027 47.353 |
| 2nd flash: |
S26 53.604 E027 54.347 |
| 3rd flash: |
S26 50.600 E027 02.338 |
| Last flash before dying: |
S26 48.598 E027 11.326 |
I hope you can make some sense out of it to be able to find the cache!

You can validate your puzzle solution with certitude.