sentences:  The Harpoon system, bought by NATO from the German firm AEG Telefunken in the beginning of the 1980s, permitted stay-behind members to send encrypted radio messages across 6.000 km, thus enabling them to maintain relations between themselves.This system is not compatible with the standard communication system used by the Swiss army.However, magistrate Pierre Cornu found that in 1987, P-26 had connected foreign stations of the Harpoon system for around 15 million Swiss francs.