Method and apparatus for locating buried conveyances using locating & confirmation signals with an array of sensors

摘要: Precise location of a buried utility conveyance (10) is achieved by impressing on the low frequency conveyance-locating and confirmation signals, later being pulsed in particular pattern unique to be located. A first sensor (22) detects magnetic field radiated upon receipt signal. An array (24) sensors (261 -265) second conveyance-confirmation processor (32) coupled precisely vectors from strength sensed each -265).