The only wrong thing here was the AoB. AoB angle is where you will see the sub if you look at it from the ship, or from what angle your torps will hit the ship. So your AoB should be somewhere at 48. As far as I know, this angle was not so important and in most of the cases was only a raw estimation. Is more important to be on the right side of the target
LE: The stadimeter is not broken in SH5 ? Usually I use the ruler for range, stadimeter always gave me wrong distances..