In September 1940 the Secret Intelligence Service established two stations for radio communication; the so-called Skylark A was led by Sverre Midtskau in Oslo while Skylark B was led by Erik Welle-Strand in Trondheim.
Intelligence contributing to the attack on Tirpitz was collected and sent to the RN by the Norwegian resistance, especially brothers Torbjørn Johansen and Einar Johansen.
David Johansen | Jon Lech Johansen | Bård Tufte Johansen | Ole Einar Bjørndalen | Einar Enevoldson | Einar Lönnberg | Gunnar Johansen | Einar Örn Benediktsson | Einar Haugen | Einar Gundersen | Bjørn Einar Romøren | Tore Johansen | Odd Einar Dørum | Nils-Olav Johansen | Johansen | Jan Arvid Johansen | Hjalmar Johansen | Einar Gjerstad | Einar Gerhardsen | Einar Axel Malmstrom | Einar Aaron Swan | Viggo Johansen | Kai Johansen | John Christen Johansen | Hanus G. Johansen | Eugen Johansen | Einar Tørnquist | Einar Thomassen | Einar Schleef | Einar Pettersen |