Here's some more fitzcarraldo. Apparently, some of the larger warships also shoot 'em. You can see my boat's U-Mark in #1 & #2...
The CL Naka:

and just as the 2nd torp hit...
The ML Okinoshima:

Two torps were needed
... and a few moments later:

I didn't catch the enormity of the explosion here either. She slipped beneath the waves just a few moments later
Just before that massive explosion:

The both of them.
Big city lights:

- er... wait, those are star shells... they're coming for me!
So that was the AD01 Tokyo Express mission, converted to FotRSU, and added to (do be careful). I can report that the Naka now functions as intended, and that the Asashio do not crash the game, and they do sink, but one of them took three hits, 'cause it has an iron chin... "down the throat" do not work on it - be forewarned!... lol