Radio Guidance

The writer proposes a system for radio guidance by means of the rotating radio beacon. The system described would employ two rotating radio beacons transmitting simultaneously and on the same frequency. A radio receiver carried aboard the craft to be guided would receive the combined transmission from the two beacons. Special equipment for this receiver´s output would take bearings from the two beacons and graphically triangulate to fix the position of the craft. Triangulation would be made and the position of the craft shown by means of intersecting light beams thrown upon the under surface of a map. The device would be continuous and nearly automatic in action. After the necessary initial adjustment, operation would be automatic as long as the craft stayed within effective range of the beacons. Guidance might be obtained at any point within the useful range of the beacons. There would be no limit to the number of routes and of planes served simultaneously. The routes might take any direction relative to the beacons and be as irregular as desired without decreasing effectiveness. The writer believes that with beacons suitably located the system could afford guidance for landing on a fairly large field.