Okay, here's the really tricky part of the Dick Okane system and the only common mistake that makes you miss. And when you miss this way, the torpedo just takes a sharp turn and heads for Toledo! It doesn't go anywhere NEAR the target, as you saw.
When you see this it's guaranteed to be only one kind of error. You have to be very careful about whether you set to starboard or port AoB. Visualize your target as you will as it approaches. Which side of the target will you be looking at, its starboard or port side? THAT is the AoB setting you will use. Because it's starboard or port 90-the lead angle. Setting starboard when it should be port is going to send the torpedoes to Toledo.
Here's your setup:
Ignore the course for the submarine, its true course is 78º.