This locating technology has been adapted from the oil field. They are very accurate and the head can be located from the drill rig itself without walking over the drill head. Since all of the data is transferred either through the drill stem or through a wire, it is possible to drill in areas where interference is too great for a walkover-type system. The power that probe needs is transfered via wire line. That is wht It is more suitable for long crossings because of its accuracy and no risk about battery charge.

Magnetic coils is established at entry and exit point to provide reference magnetic plane. Drill head's location is determined relative to this plane.

The signals that has been received from probe are processed by computer and displayed as an underground bore path profile.

They are also good for deep bores where accuracy is crucial.

The major downside of a magnetic guidance system is the price. They can be many times the price of a walkover system, and they require substantially more training to operate.

As a world wide contractor Deltek is capable to aim a coke bottle where is 2,000 metres away by drilling 300 meters beneath the ground via Paratrack® locating systems.