[NefariousKoel]

OK.. I tried a couple things.

Something is definitely off. Here's what I've found that works when fooling around shooting that Mogami at 9kts:

Open tube, set torpedo settings, input range, fire. This would technically still put my fish near the stern or on an aft miss.

For the settings I've found that adding 1 and more likely 2 knots to the target's actual speed helps quite a bit.
Raising the speed +1kt gave me the first hit at center and the last 3 in the aft quarter.
Raising the speed 2kts gave me a hit in the fore, etc. These were all locked on target with no spread.


The other way I tried was seeing how far I should lead my angle spread to achieve the same results. The target was heading right.

When I used +9 deg. right angle it struck under the forward gun area.
When I used +5 deg. right spread angle, the torpedo hit it almost dead center.
With +3 deg. hit it in the aft quarter.
Lastly, +0 degree angle struck the very stern and almost missed.

I'm not sure which 'workaround' will be my one of choice but I'll play with them a bit more and see which is more reliable.