I made a small instructions to friend:
http://img153.imageshack.us/img153/4...gettingcv7.jpg
kohteen kulkureitti = target's course
havainto = observation
suunta = bearing
etäisyys = distance
hope thats enough information, and im sure you get the point. You should wait 60secs between observations, and fire torpedo when target is front of you (bearing 000). You can find all tools from game, i just made that with autocad at work because i was bored.
You need to do little preparation with your position versus target before you can use this, and you must stay still with your sub.