In the late 1960s an experimental Anglo-American military over-the-horizon radar known as Cobra Mist was built on the peninsula. It closed in 1973, and in the late 1970s and early 1980s the site and building were re-used for the Orfordness transmitting station. This powerful mediumwave radio station – originally owned and run by the Foreign Office, then the BBC and, after privatisation in the 1990s, a series of private companies – was best known for transmitting the BBC World Service in English around the clock to continental Europe on 648 kHz from September 1982 until March 2011. The following year the site became disused until Radio Caroline began broadcasting from the site in December 2017.