Archaeological research is increasingly combined with environmental and geophysical surveys and UXO detection. This is because it is not uncommon for earth moving activities to take place at locations where objects or constructions of archaeological interest are (expected to be) present in the underground. In those cases, archaeological research is required. T&A uses Geophysical techniques  to make archaeological surveys more efficient. The use of geophysical techniques in archaeological research is relatively new. The instruments measure anomalies and changes in the subsurface without the soil being stirred.