Jindalee Operational Radar Network
（重定向自JORN）
![The JORN area of operation.](/Images/godic/202501/21/JORS.svg5537.png")
The Jindalee Operational Radar Network (JORN) is an over-the-horizon radar (OTHR) network that can monitor air and sea movements across 37,000 km. It has an official range of 3,000 km. It is used in the defence of Australia, and can also monitor maritime operations, wave heights and wind directions.