My no brother good in law is a surveyor and they commonly use dousing for finding everthing from electric lines to unmarked graves. All they use is some L shaped pieces of wire and hold the short ends close to body at about chest level or a little lower. I have tried it several times to find our septic or in the past water and gas lines, works every time, the wires will cross and X marks the spot. This being said, i don't know whether I would use this solely for important or dangerous digging.
Robert B
