everybody knows, the nazis lost in the atlantic because they got far behind in the technological race: breaking enigma codes and detecting HF/DF were among the keys farctors. So here's my question: Why Doenitz never seriously considered the idea that british could detect german communications system with wolfpacks?? True, doenitz had some suspects (he ordered the fourth rotor in enigma machine) but at the same time he was the person most involved in the problem. I think he should have had more than "suspects". He had in his hands all the clues to get a clear picture of the situation and eventually take effective countermeasures. Is Doenitz career overrated? maybe he was more ideologically driven that we are used to think..... he was blind to facts. Maybe he simply could not accept british/american superiority... but certainly he didn't dislike to be in hitler's favours. what do u think? have u got additional info on this?