Hello jasonb885,
thanks for making this clear - so i'll be a bit less lazy engaging convoys in the early years

.
I sneaked through the outer perimeter in the night and managed to sink a C2 with one torpedo, but unfortunately i had already fired two to be sure (what a waste). After this a Flower corvette at some 1900 meters away switched on the search light, but they did not find me.
However i realized that a Flower class corvette is faster than my VIIB, in case they had noticed me i would not have been able to outrun it.
As far as i know the corvettes were good for some 12 to 14 knots, but here they easily reach the speed of an U-boat.
Thanks again, greetings and happy easter,
Catfish