 Both machines were subsequently overshadowed by the great success of the US Navy Bombes.Towards the end of 1942 the previously experimental non-Morse transmissions from teleprinter cipher machines were being received in greater numbers by the British Signals Intelligence collection sites.The one using the Lorenz SZ 40/42, code-named "Tunny" at the Government Code & Cypher School at Bletchley Park, was used for high-level traffic between German High Command and field commanders.