9. x would be a scratch mark to help with the 2 magnification settings. The sine of the angle it is near should be the same as the lower magnification divided by the higher magnification. I don't remember at the top of my head what the placement is, or what magnification levels MaGui uses. But initially it was at 14.5 degrees, equal to 0.25. Or the reduction from 6x to 1.5x. In low magnification (1.5x) you would place the observed target height against that mark. And the propper value would be above the 90 degree mark as if you were looking in high magnification mode (6x). For the calculation of the AOB while looking in low power magnification another turn from 90 to 14.5 (or the other way around, I forgot) was needed to get the proper result. (I'm at work so I can't fully describe the procedure. Also I need to dig up the finer details from a memory.)
10. Can you show a screenshot? It's been a while since I looked at the Magui interface. I can imagine 2 wheel indicators with a time scale used for calculation (of speed).
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