The LORAN-C transmitter Havre was the master station of the North-Central U.S. LORAN-C Chain (GRI 8290), situated at Havre, Montana at 48°44′39″N 109°58′54″W / 48.74417°N 109.98167°W / 48.74417; -109.98167. It used a 700-foot (210 m) tall mast radiator as an antenna with a transmission power of 400 kW.

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.

• http://www.tech-service.net/loran/LORAN-1.XLS^{[permanent dead link‍]}
• http://www.megapulse.com/chaininfo.html Archived 2012-02-06 at the Wayback Machine