Dean
Active member
perseus said:Dean
Well done for the research. I am tempted to give you the question since it is almost correct in principle, but it is still not the convoy I was thinking of. I hoped that the new weapon would have made it clearer and distinct from the other convoy operations, but I am still not sure if the above strictly matches the requirements of my original question.
The one I am after actually involves two decrypts by BDeinst and one by GC and Bletchley. ie the U boats were put onto an intercept path due to one BDienst decrypt, GC/Bletchley then read the Uboat cipher to change the convoy course then BDeinst read the convoy code again to change the route for a second time. Indeed after all this cat and mouse activity GC/Bletchley read another decrypt which did not provide a position but one which for the first time revealed the inner mind of Uboat command and the crew of the submarines. This must have gave the admiralty increased confidence for the final attack on the U boats.
Man, SC 129 did come close. B Deinst did decode two messages about them, and Bletchley did decode the U-Boat response. The only difference was that one group of U-Boats was sent, then when it became clear that the convoy had avoided them, U-Boat HQ sent a different group to a new intercept location.
perseus said:(It seems incredible after all this activity that either side did not work out that their cipher had been compromised)
I PMed this to Reiben when he brought up the same point in one of his posts. He did not answer, but it's OK, I was not insulted.... I'm bigger than that.... I don't mind....:crybaby:
Anyway, I sent the following:
It seems that the Allies were as slow in admitting that their ciphers had been broken as were the Germans. But then again, this was one of the few battles of WW II that was fueled by ego. The people working in the cipher departments on both sides were total geniuses, and they hated admitting the possibility that someone else might be smarter than they were. As a result, they were slow in replacing the ciphers. The Allies often suspected, then knew that their ciphers had been broken, but it usually took a while to admit it. The Germans were even slower, and the Japanese were the slowest of all. It was no accident that the Japanese were also the most penetrated.
Dean.