Late March 1941.
Right, so this has become my rambling patrol diary.
Got a report saying there was a warship heading towards Iceland.
So imagine my surprise when I saw 2 unescorted gems! Both were traveling at about 20 knots, so I had to sprint on the surface to catch up.

They spotted me, popped a few shells at me and started evasive maneuvers - which slowed them down to 13 kts each. I got within 3 km (no damage!) and submerged. They were difficult targets - zigzagging away, at a bad angle. Especially the Hood. But it was my only shot, or I could risk being blown out of the water again to flank.
I launched 4 torps. I pretty much guessed how I should lead my targets.
Surprisingly, a T1 at max speed hit the Hood dead center. Didn't seem to do much. The other T1 went wide.
2 T2's hit the Prince of Wales around the propellers and she started going down almost immediately. She had apparently sped up (I was aiming at the dead center)
The Hood was steaming away... but at a slower speed? Apparently my torp had crippled enough boilers to knock an engine out of commission.
Then she slowed to a stop, very obviously taking on water. Perfect - no more running!
I popped some Wagner on the gramophone (a little mod of my own) and ran around to her side, fired a couple torps to make sure she went down, and voila!
2 torps left aft, 4 for'd. I still might prowl a bit more.