Quote:
I haven't found any actual wartime references to taking prop counts and I have a fair collection of WWII related submarine books
|
That's interesting, I though I had readed something about it in one of O'Kane's book, must be wrong. What I can confirm is that Erich Topp's sonarman certainly did estimates of speed based on propeller counts. NOt only have I readed it in a book, but there is also video footage in which he appears doing that during Operation Drumbeat.