For that purpose i turnd on the auto targeting.
When I ponted the periscop at the targeted bering my sound man gave to me it pop up and the bow was 26 degree.
So he was coming at me. But the drawing i did showed that he is at least 11 km far but actualy he was at 4-5 km.
I took the reading`s just like you told me to.
Waited that the diference between 1st and 2nd to be at least 3 degree, and I remeberd the time (9 minuts),so I used that same time to get the 3rd beringline. Draw the triangles and copied the angle.Was not sure was it from right to left ok so I did both and gained 37 and 135.Because he was closing on me I used a 37 angle but as you can se it was wrong.
The angle gained by the drawing is actualy aob wright?!So if I copy it form the targets last known position It would give me the line wich would represent the targets real cours of heading.

And yes I am interested in any kind of help , tutorial misions as you metioned, I would
aprishiate that wery much.
Pisces your sugestions are also welcome.
I was wondering what is that program that you use to draw those pictures?
Thak you both for your effort.You are wery good people.
Sorry for Eng I am from serbia.
Pozdrav
P.S. I envy you so much for all your knowledge.