Electromagnetic locating (EML) is a technique where a unique signal is put onto a metallic / conductive utility. This does not have to be a cable, it can also be a metal pipe. The signal can then be followed from the surface using an EML receiver, so that we can determine the position of a utility. The accuracy of an EML survey is very high, because a single utility is exposed to the signal. Meaning, when that signal is followed you will know exactly which utility you are tracking. When the utility is traced and the position is known, the location is surveyed using extremely high accuracy GPS, 06-GPS and TS (Total Station) equipment. This allows precise mapping of these findings.