Ann: Ground gravity survey commenced at Rum Jungle, page-5

Ten years ago the ground radar was so good they could get through multiple layers with a high resolution, my understanding was better than 600 metres deep througha overlying rock shelf ... sturt shelf..whatever its called south aussie eyre peninsula, there were then only two available such pieces of equipment in australia and from memory the csiro owned them, im wondering if its got to the stage where you might be allowed to be jorc compliant with say 200 to 500 metre drill spacings on top of positive ground radar results never say never, lots of crazy shit out there these days, virtually impossible to keep up with the rate of change