Shoran, an abbreviation for short range navigation, is an electronic system used for short-range aerial navigation. An airplane using shoran sends out radio signals to two ground stations, which rebroadcast the signals to the airplane. Electronic instruments record the time interval between sending and receiving the signals. Shoran calculates the distance to the stations by means of these intervals. Shoran was developed during World War II by the U.S. Army Air Forces and private industry. See also Loran; Navigation.