Abstract: A vehicle guidance system is disclosed that is suitable for guiding a vehicle or person along a straight line navigational aspect with signaling and processing typical of hyperbolic navigational systems, for example, in certain farming operations where the farm vehicle utilized must repeatedly be caused to traverse an unmarked field in substantially straight parallel paths that are evenly spaced with respect to one another, such as in fertilizing the field. An electronic navigation system is utilized which includes a transmitter and a receiver positioned upon the navigating vehicle and a pair of repeating transmitter/receivers spaced with respect to one another a known or measured distance and along a line normal to the intended straight line path to be followed by the vehicle. The transmitter causes each repeater to be alternately energized and the resulting signal is detected at the vehicle mounted receiver and the phase difference between each transmitted and received signal is measured.