The cache is not at the listed coordinates. This is either a Pulti or a Muzzle. It is a Multi with a simple field puzzle.
If you do want to go to the listed coordinates however, what you will find is a basketball ring. Many people are here every weekend and even after school hours on week nights to use this for practice or just plain messing about.
If you are a good enough shot you could shoot your basketball to the place where the cache is hidden. It is a real long shot though.
You will need to shoot it a distance of XXX.X metres
You will also need to shoot it at a bearing of YYY.Y degrees
YYY.Y can be found at Waypoint 1 on a tag in the Cache GC7F28G A Bridge not too far.
XXX.X can be found at Waypoint 2 on a tag in the Cache GC7F27H It’s Not Coorong
You then need to convert these numbers into new coordinates to find the cache.
You are looking for a camouflaged container in a public location.