An object locating system (100) in which there is an observation device (104) observing at least three datums (106, 112, 114), each of which datums (106, 112, 114) having a positioning system that reports it position to the observation device (104). The positioning systems of the datums (106, 12, 114) being calibrated so as to accurately report their relative positions. The observation device (104) has a camera whose field of view (116) contains an object (18) to be located as well as at least two of the datums (106, 112,114) and a range finder that measures the distance (110) between the observation device (104) and at least one object (18) within the field of view (116) of the camera. A computing device calculates an azimuth and (X1, X2) elevation angle (Y1, Y2) between two datums (122, 114), or between the optical axis of the camera and each datum (112, 114),in the image so as to triangulate the position and attitude of the camera (104) at the time the image was captured using received position data for each datum (106, 112, 114) at the time the image was captured; and also calculates an azimuth and elevation angle between an optical axis of the camera and the object (18) in the image. Knowing the position and attitude of the camera (104) and a distance (110) to the object (18) at the time the image was captured, it triangulates a position of the object (18) at the time the image was captured.