See Conrad GR-3 Deep Seeking Ground Scanning Detectors https://www.metaldetector.com/brands/conrad This video covers an overview of the process for calculating target depth in the field. The Conrad GR-3 is a deep-seeking 3D ground scanning treasure detector. ‌See the results instantly on your Android or IOS phone or tablet. ‌Displays all types of metals, including magnetic (iron or steel) and non-magnetic (gold, silver,‌ ‌or copper) treasures. GR-3 is built into a lightweight compact ‌telescopic‌ ‌walking/hiking‌ ‌stick. See‌ ‌in 3D the target analysis in full color. Simple. Fast. Effective.