In 1938 the "Deutsche Freiheitspartei," a small political counter movement acting against Hitler, tried their luck with offshore radio, broadcasting their appeals for resistance to the population of Germany. The daring operation lasted only for just three months and a few days. Martin van der Ven here recollects the short history of the "Sender der Deutschen Freiheitspartei" and the people involved...
Full article:
http://www.icce.rug.nl/~soundscapes/VOLUME16/Offshore_staton_against_Hitler.shtml