A relative position navigation system and method installed in a first participant for computing the relative position, in range and azimuth, of at least one other participant in the system without using azimuth-sensing apparatus. The system includes ranging apparatus for determining the distance between...http://www.google.com/patents/US4814994?utm_source=gb-gplus-sharePatent US4814994 - Relative position navigation system with means for computing synthetic azimuth
