If you want point and click talk to Hitech.
If you want to pull up the offline target and test the ranges you can answer your own question.
If you can't shoot, see a Trainer, OR, make your own gunsight. Hitech has kindly strewn tools and visual aids all over his game to assist you in creating your own personal dead eye, sure shot gunsight.
You won't like the real one used in the Flakvisier 38/40. It's a 100Mil amber cross controlled by a fire control computer. Only thing I could do for you was the ranges, diagonal lines and give you a 120Mil ring. What I created is no different than the Linealvisier 21 manual backup sight for the quad 20mm and manned 3.7 guns. I cannot find the reticle for the manual reflector sight Flakvisier 35 and have only seen a very blurry one in a ww2 propaganda video. Almost looks like mine. But, knowing ww2 gunsights and the rational behind the range and lead rings used to solve leading at speed. You can make an educated assumption of the main ring diameter as seen through a gunsight.
Flakvisier 38/40 electronic fire controlled.
Manual Optical Flakvisier 35 and what we probably have modeled in the Osti\warble.
Familiar looking gunsight with a 3.7.
Linaelvisier 21 and why my gunsights don't need someone to move the range bar for you.