23:39 -
breaking contact. Interception was a failure. Despite careful planning, the convoy changed direction (E->SE) about 4km from our calculated position, and I had a Flower corvette headed straight at me.
Wanting to live another day, I decided to abort the run, launched a magetic T2 at 4m towards the corvette. Hit, sank.
Turned back west and tried to hit some targets. Only one Ore Carrier was hit (light damage towards the bow), but didn't sink. Tried a stern shot against another Flower, but it speeded up and the torpedo passed behind it.
Not following the "Convoy of Scheiss Glück", since it's xmas tomorrow and I'm away for the week
Will continue with a few uneventful days accelerated when I get back.
Additional note: the immersion-killer sunset difference between 17th April (19:37) and 23rd December (15:57) will be fixed by shifting game/real time with 4 hours.
The next realtime patrol will have to be played on the exact date.