You have to search a bit more, there are tutorials available for the KiuB. It's defnitely a fine mod and worth it.
It's very easy to find torpedo solution if you leave map contacts enabled. The most important observations are speed and angle on bow. So I simply put a marker over the target every 60 seconds, and measure the distances it travels in a minute. 150 meters are 5 knots, 250m are 8 knots etc. ( 1 knot is 1 nautic_mile/h and or 1.852 kilometer/h, or 30.5m/minute.
http://en.wikipedia.org/wiki/Knot_%28unit%29 )
I also have the exact course of the target when I connect the dots with a line.
With course and speed established it is easy to use the drawing tools (protractor tool) to make a angle measurement at eg 50 or 60 degrees that lies exactly over the course of the ship, and put the data into the computer at the exact point in time when the ship reaches the base of the angle. When I do that properly I hit every time, except when the torpedoes fail.