Frustrating !
It is midnight !! Large Tanker (~13,600 tones)
One torpedo hit in the 1st 3rd.. flames… (slowing down to stop)
I surfaced about 1,800 meters from her half sunk massive body.
She sees me. Both her spotlights lights on my submarine.
3 – 4 deck gun shots – the spot light stopped lighting.
That's it!
No "She's going down.."
No mark on the map.
No renoun
WTF !! 
What do I do in such situation ?!
Thanks,
Temujin