Method and apparatus for locating utility conveyances in an enclosed area

摘要

A selected one of a plurality of underground utility conveyances(14-14) may be located in an enclosure (10) by providing each conveyance with an electronic marker (18). Each marker is responsive to a first RF signal from an electronic marker locator (32) operated by a utility worker. Upon receipt of the first RF signal, the electronic marker associated with the conveyance of interest responds by broadcasting a second RF signal containing information indicative of the conveyance. The second RF signal is received and processed by the electronic locator marker to locate the conveyance and ascertain information related thereto.