 The "Espora" class has not been immune – "Espora" herself spent 73 days in South Africa in late 2012 in a dispute about payment for repairs to its generators.The operational status of "Parker" and "Rosales" is not clear, as of November 2012 they were waiting for spares, whilst "Spiro" lost her sonar in a grounding accident in August 2012.The 1974 Naval Constructions National Plan was an initiative by the Argentine Navy to replace old World War II-vintage ships with more advanced warships.