Exploring the structures in a salt dome can not be carried out from the surface to the degree of accuracy needed for underground cavern construction, for instance. To augment conventional exploration techniques (3-D seismics and gravity), DMT offers surveys from boreholes using direction-sensitive or 3-D down-hole radar (GPR, EMR) whenever the deposit is examined in the vicinity of the borehole.

Three-dimensional exploration of the structures of a salt dome, often found to be folded in complex patterns, is possible with the required accuracy only with directional down-hole radar, working from inside the dome.
The DMT down-hole radar system enables exact determination of the location of the reflecting objects using measurements in just a single borehole. Antenna running at 50 MHz and 10 MHz are used for this purpose. The range of the directional down-hole radar system can be as great as 700 m. The probe can be used at depths of 2,000 meters.