A program of field tests of a new electromagnetic sounding technique was conducted in the Northern Territory. The tests were conducted to evaluate the operational features of the technique, and to determine its ability to provide useful depth information over localised conductive structures. The results are compared with earlier work which used an alternative electromagnetic sounding technique, and with drilling results. The tests demonstrated the operational and interpretive flexibility of the new technique. In particular they showed that the technique can be applied with normal, unmodified, electromagnetic prospecting equipment. The depth information which the new technique provided was in good agreement with control information.