LORAN-C transmitter Havre was the master station of the North-Central U.S. LORAN-C Chain (GRI 8290). It used a transmission power of 400 kW. Havre LORAN-C transmitter was situated at Havre, Montana at 48°44'39" N, 109°58'54" W,(). Havre LORAN-C transmitter used as an antenna a 700-foot (210 m) tall mast radiator.
The station was closed on February 8, 2010 as a budget cut. The station, and all of the others, were considered to be obsolete with the general availability of GPS systems.