To sink or not to sink?

[aldeluca]

Hi guys. I'm playing OHII career, north of Ireland Dec. 1939 and apparently found a small convoy in heavy fog.
I sank the first of the 2 destroyers escort wasting 2 precious fishes (bow and stern) to do this and the escorted convoy pop out of the fog as a luscious HOSPITAL SHIP with a unmistakable red cross painted sporting the Union Jack high above.
Call me insanely evil but besides morality issues, that I do not care much, if I sink her will I lose or gain renown? After all if no uboot shall hit her, why the need of 2 destroyers as escort?
When I was a kid and played videogame in the 80es there was a game with a bazooka and if you hit the pixel of what resembled a truck with a red cross it was really bed for your score. Rules may have changed in 30 years...

Game is paused, data in TDC input, the destroyer far behind, the red cross centered in my periscope... shall I empty a couple of tubes or send my apologies to the second destroyer and sneak away?

BTW, since it's my first post after 2-3 years and the last was with SH4, I would like to thank TDW, Sober, Trevally and all others that contributed to mod and made this game fantastic from the unplayble creep it was when I bought it in 2010. After 3 years and a new hardware I came back to the forum with the hope that my brand new videocard would immensely improve SH4 and I found instead a completely different SH5, so I resurrected my dvd!
Chapeu guys! ...you made my days