LemonA, you are right. 6.something degree is what it should be if you redraw the first images based on the figures provided. The uboat position (range 10 km) is in the wrong spot if you compare it to the 8 km safe distance circle. Wether it is a nm vs km thing, I don't know. But the scale comes close to 1.852.
What I also failed to notice back then is that he started with drawing a bearing line to 87 degrees (clockwise from up). He stated this as being a relative bearing. Later he plotted the target speed vector with a 295 course direction. But this is "true". So his images assume the uboat/sub is on a heading North/0 degrees when taking the target bearing. Since it usually is not, he really should have said to plot the target at whatever "true bearing" you have (= relative bearing + uboat ship course .... give or take 360 degrees)
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