SEMT Pielstick
Beyond the Nixie countermeasure system, the funnels aboard the avisos were heightened due to issues with the gases coming from them. had SEMT Pielstick 12 PA 6 BTC diesels with infrared suppression systems installed which led to delays into the vessel's entry into service. In 1993, and had their rocket launchers removed and a Syracuse II satcom terminal installed. Plans were drawn up to give the two ships a hangar and flight deck for helicopters, but this was abandoned.