15. The long-range navigation system (LORAN) uses hyperbolas to enable a ship to determine its exact location by radio. {This technique is becoming obsolete by the implementation of GSP (Global Positioning System, but it still used as backu p}. Two LORAN radio transmitters A and B are situated on a straight line separated by 200 km. The two stations simultaneously tranSmit signals at regular intervals. Determine an equation afa hyperboia described by the flight path of an aircraft when the on board radio receiver determines that it is 20 km closer to station B than to station A. Draw a rough diagram that illustrates where the plane is on the hyperbola with respect to the transmitters (foci)