Abstract: According to a target locating method and system, each of a plurality of sensing stations, for example HFDF sensors, senses a nominal value of a predetermined measurement variable such as a bearing, differential times of arrival, etc., relating the location of a potential target in a target area to the location of each respective sensing station. Error models associated with each sensing station, along with the nominal measured variable for each sensing station, are transmitted to a central data collector. A central processor receives the collected data and directs a monitor to display a representation of the target area. The invention also provides a method for estimating the position of the target based on the nominal measurements of the location variable and also on the error models for each sensing station. The target area is divided into a grid of target area segments.