Loran-C

Loran-C (Long Range Navigation-C) is a terrestrial radio navigation system used primarily for maritime and aviation purposes. It was developed in the mid-20th century and became operational in the 1950s. The system functions by using a network of land-based radio transmitters that broadcast precise timing signals. These signals are received by a Loran-C receiver, which calculates the user's position based on the difference in the time it takes for the radio signals from multiple stations to reach the receiver.