You can see a map and where all the gliders are here:
https://puretrack.io/?l=-31.57737,117.37461&z=8.5
This will update every few seconds so you can see the racing live and see who is leading.
Note if they go very far away they may go out of range so don't worry. They will come back later, at about finish time. Some gliders have satelite trackers and they can be tracked further.