All mole type robots use sonar-technology. Usually these sonar's are impossible to use by humans, but this type of experimental sonar is equipped with a primitive interface for surveilling data. A high technical skill is still required to use.

All mole type robots use sonar-technology. Usually these sonar's are impossible to use by humans, but this type of experimental sonar is equipped with a primitive interface for surveilling data. A high technical skill is still required to use.