Woohoo! I sank the HMS Nelson, at 95% realism, in GWX. They didn't even get a sniff of me. I let loose 4 torps from about 2,500 yards, and two hit. I don't know where, because I was already headed for 150 meters, silent speed, but I almost immediately got a "She's going down!" message, and the Nelson showed up in the log.
For the same reason, I didn't get any screenshots. A destroyer came after me, but never heard me. He just circled around from the general area I launched from.
No weapons officer assistance, just stabilized view.
And I have Hitman to thank for it, because I used his nifty KM wheel.
On edit: January 1940, west of the Channel.