Down-hole surveying service is provided for assisting in the discovery and definition of numerous ore-bodies around the world. Down hole geophysics saves drilling time and associated costs when looking for step-out targets and utilizes a 3D-component probe capable of obtaining both magnetic and electromagnetic data. The data obtained by the 3D probe is gathered from both in-hole and off-hole magnetic and electromagnetic sources and once processed, provides a vectoring tool for future drill holes. Additionally, a tight-spaced ground magnetic survey commences immediately to cover all identified target areas. This provides greater detail and definition than airborne surveys.