eventually gave her an ultimatum to become a spy too, which she declined, forcing the couple's separation. She divorced him in 1966 and moved to Ireland with her children, claiming that she lived in constant fear of the Soviet security services. She subsequently published a book in 1999 about her experiences called The Spy's Wife. In 1973, Gerhardt married his second wife, Ruth Johr, a Swiss citizen who author Chapman Pincher claims was already a spy for the German Democratic Republic. According to Gerhardt, he recruited her shortly after they were married. She travelled to Moscow to undergo training. Gerhardt rose through the ranks of the naval establishment as his career progressed. Upon his return from training in the United Kingdom in the early 1970s, he served as the naval liaison officer with the defence company that subsequently become Armscor. From 1972–1978, he was appointed as a senior staff officer to the Chief of the SADF in Pretoria. In this position he was able to access South African Army and Air Force secrets and plans regarding the South African Border War. He claims direct involvement in aspects of Israeli and South Africa's military cooperation, using this position in 1975 to pass Israeli secrets to the Soviets, including details of the purchase of Jericho missiles from Israel. Later, he was appointed commander of the strategically important Simonstown naval dockyard. In this position, he had access to all the South African Naval intelligence reports from the Silvermine listening post near Cape Town, as well as technical details of weapons systems. He reportedly revealed to the Soviets most of the Western naval surveillance techniques for the South Atlantic. During the 1982 Falklands War, Gerhardt was allegedly able to use his position to supply the Soviets with detailed information about the locations of Royal Navy ships in the south Atlantic that the South African Navy intercepted at Silvermine. Admiral of the Fleet Lord Hill-Norton publicly contradicted this view, but supported screening of Royal Navy officers who had been in contact with Gerhardt throughout his career. Gerhardt visited the USSR five times during his career, while his wife travelled with him twice in 1972 and 1976. He was reportedly paid 800,000 Swiss francs by the GRU for his spying activities; his contact in the GRU said that money was not the motive for Gerhardt. Arrest, trial and subsequent release Gerhardt's cover was finally blown by