LORAN-C chain

LORAN-C (Long Range Navigation) is a terrestrial radio navigation system that uses synchronized radio signals from a network of fixed stations. A vessel or aircraft measures the time delay between signals from multiple stations to determine its position accurately over long distances—up to thousands of miles. These stations form a "chain," with each station transmitting precisely timed signals. By comparing the arrival times from at least two stations in the chain, navigators can calculate a line of position, helping them determine their exact location at sea or in the air.