[shawr-an, shohr-] 
| a system for aircraft navigation in which two signals sent from an aircraft are received and answered by two fixed transponders, the round-trip times of the signals enabling the navigator to determine the aircraft's position. |
| sho·ran (shôr'ān', shōr'-) n. A relatively short-range navigation system by which a ship or aircraft can determine its position with high precision by measuring the times required for a radar signal to reach and return from each of two ground stations of known position. [sho(rt)-ra(nge) n(avigation).] |
| shoran short-range navigation |