Ok, in the mean time I had another run through of your documents and the tvre.org site explanation of Auswanderung and Ausdamphverfahren. Seems very do-able to recreate these. However, is it me or does
"Drawing 21. Rundschieber für Auswanderungsverfahren “B” [12]" have crooked scales? 170 hm distance with 2.5 degree bearing change should show 24 nm/h (according to conversion factor 6000/1852) instead of 23. When I compare different marks each takes another value for meters per nautical mile. Same goes for Drawing 22. Not to German standards if you ask me.
