I found this tutorial , seems to be pretty popular
http://www.subsim.com/radioroom/down...o=file&id=1647
Is that a good one? I'm going to print it out and put it in a little booklet
I kind of get it.. looks like I'm entering the data and the tdc computer kind of figures it out..
I remember in many books that the Americans TDC was better than the Germans at the time?