Frequency Metal Detector operator Error

An Operator or a user who has not Learned or does not know how to work with a Metal Detector or Detector or Manual Ground Radar or Mine Detector or Ground Penetrating Radar or Frequency type GPR will make a mistake at the same time as practicing  and Gold and Silver or the intended Target It does not find the hidden thing and there is an Error in the work of the Metal Detector or Detectors or Manual Ground Radar or Mine Detector or Ground Penetrating Radar or Frequency type GPR with VDI Number Adjustments (settings) in Edit and Surface and Size or Shallow or Thresholds to Separate or Discriminate Gold or Metals do not exist in the Depth because in the Metal Detector or Detectors or Manual Ground Radar or Mine Detector or Ground Penetrating Radar or GPR of the Frequency type with the mentioned Adjustments (settings)  the ability and power to Detect Ground fault and determine the main Target or Gold or Silver and Metals available to the operator or user  and the Ground fault can be found by changing the Adjustments (settings)  in the main work scene and the operator or user must follow the correct principles in the instructions with a Metal Detector or Detector or  Manual Ground Radar or Mine Detector or Ground Penetrating Radar or  GPR should search for the main Targets or Gold and Silver and the desired Target from other sources that have the same shape or the same Location as Gold or Silver or the desired Metal should be isolated to identify Ground fault or operator Error