Usually, for error mitigation and shortest possible warning for the enemy to avoid I'm looking for an AoB of 80-90 and looking for a torpedo track angle of 110º, the most difficult shot to maneuver to avoid from, AND the most error tolerant possible solution. I'm looking for a gyro angle under 20º to cancel out range error and I'm looking to close range to about 500 yards. Torpedo arming distance varies with mod but is 300 yd stock. I believe TMO it 400yd. In any event, a 500 yard shot at TTA 110º and a gyro angle of less than 20º with a fast torpedo is unavoidable and ends with a BOOM.
Another elementary error in greywolf''s "method" is that he says that any two acute angles contained within a right angle must total 180º. No that is not true. If you pick a 10º angle within a right angle and a 30º angle and total them 40º does not equal 180º. If you take a single angle and its compliment within the right angle their total is 90º, not 180º. After all a right angle IS a 90º angle. Divide it up any way you want and the sum of the angles contained within the right angle MUST be 90º. That's Geometry 101. Euclid would be proud!