New Alan Turing Film

[Jimbuna]

Originally Posted by CCIP

I'm pretty sure that was a case of just ordinary DF intercept rather than Bletchley Park. The radio transmission in question was, among other things, exceptionally long (some sources I read state that the transmission lasted a full 30 minutes).

The decoding of messages was far from instantaneous and I believe at that point in the war it took an average of 30 hours for a message to be decoded. Strategically, ULTRA was extremely important but operationally it was not of much use - a ship can be practically anywhere 30 hours later. On the other hand, DF intercepts were fairly reliable, provided the contact could be sighted and shadowed after the transmission.

Exceptional detail/reasoning and how my memory remembers the events of the day