I have been using the D2 in an open field that has 1700's artifacts. So far I have found lots of flat buttons, Va half pennies and A few CW relics. All the things I have found has not been more than 8" deep. Any of my other detectors would find them. So, in my opinion, either there is not anything deep in that field or the D-2 is not as good as expected. I have used several programs with the same results.