A line locating system, comprising: one or more sensors (204, 206, 510, 512) mounted on a sensor platform (208, 520), the one or more sensors configured to detect a magnetic field emitted by a current along a line; one or more transmitters (202, 502) mounted on a transmitter platform (208, 504), the one or more transmitters configured to induce a current along the line to generate the magnetic field; and a processor driver (210, 506, 516) electrically coupled to the one or more transmitters and the one or more sensors to drive the transmitters and receive signals related to the magnetic field emitted by the current along the line from the sensors, the processor driver both driving the transmitters with a continuous wave and processing the signals by adjusting for effects of direct coupling between the transmitters and the sensors; and deriving a position of the line relative to the sensor platform, wherein the processor driver includes a transmitter driver on the transmitter platform and a receiver driver on the receiver platform, the transmitter driver coupled to drive the transmitters on the transmitter platform with a continuous wave and the receiver driver coupled to receive signals from the sensors on the receiver platform, the processor driver further configured to process the signals by deriving the position of the line, wherein the sensor platform and the transmitter platform are mobile with respect to the line, and characterized in that the transmitter platform and the sensor platform include navigation capabilities, one of the transmitter driver and the receiver driver has information about positions of both the transmitter platform and the sensor platform, and one of the transmitter driver and receiver driver automatically guides the transmitter platform along a path. one or more sensors (204, 206, 510, 512) mounted on a sensor platform (208, 520), the one or more sensors configured to detect a magnetic field emitted by a current along a line; one or more transmitters (202, 502) mounted on a transmitter platform (208, 504), the one or more transmitters configured to induce a current along the line to generate the magnetic field; and a processor driver (210, 506, 516) electrically coupled to the one or more transmitters and the one or more sensors to drive the transmitters and receive signals related to the magnetic field emitted by the current along the line from the sensors, the processor driver both driving the transmitters with a continuous wave and processing the signals by adjusting for effects of direct coupling between the transmitters and the sensors; and deriving a position of the line relative to the sensor platform, adjusting for effects of direct coupling between the transmitters and the sensors; and deriving a position of the line relative to the sensor platform, wherein the processor driver includes a transmitter driver on the transmitter platform and a receiver driver on the receiver platform, the transmitter driver coupled to drive the transmitters on the transmitter platform with a continuous wave and the receiver driver coupled to receive signals from the sensors on the receiver platform, the processor driver further configured to process the signals by deriving the position of the line, wherein the sensor platform and the transmitter platform are mobile with respect to the line, and characterized in that the transmitter platform and the sensor platform include navigation capabilities, one of the transmitter driver and the receiver driver has information about positions of both the transmitter platform and the sensor platform, and one of the transmitter driver and receiver driver automatically guides the transmitter platform along a path.