I did a test run (I have the game saved, just as a gain contact with my new SJ radar

) before I posted this thread. Both times I sank a Fuso and onced damaged a Yamato. I tend to approach from the front and run dwon the coloums so I can do a 90 degree deflection shot fore and aft at close range. IT also buys me time when they do realise that I'm there, as I have time to go deep.
I targeted the Fuso first because it was the closest and I got trigger happy (just couldn't resist taking the shot and waithing for the next target. I will hold on next time and go for the biggest fish.