Before revision: The Battle of Britain: The Greatest Air Battle of World War II, WW Norton, 1990, p.67 and the air attack on the fortress of Koepenick over Germany.Galland, Adolf : The First and the Last p 101(1954 reprinted ..) Price, Alfred : Battle Over the Reich pp95-6(1973) British develpment Early concepts upRadar coverage of the Chain Home system, 1939–40 Already before the deployment of their Chain Home radar system (CH), the RAF had considered the problem of IFF.
After revision: The Battle of Britain: The Greatest Air Battle of World War II, WW Norton, 1990, p.67 and the air attack on the fortress of Koepenick over Germany.Galland, Adolf : The First and the Last p 101(1954 reprinted ..) Price, Alfred : Battle Over the Reich pp95-6(1973) British development Early concepts upRadar coverage of the Chain Home system, 1939–40 Already before the deployment of their Chain Home radar system (CH), the RAF had considered the problem of IFF.