Oh I see. I didn't sail that far in last time, nor from the same direction. I tend to raid through the channel that leads out into AN15. From time to time I run across a couple of parked J-class destroyers there. If I head north into the bay, past the searchlights on shore, there are usually a couple of corvettes parked to the east. On your screenshot of the Nav Map, that would be about 12-15km southwest-ish of your 36km waypoint. I play stock SHIII and I don't remember which year I first encountered those, so I have no certainty as to what you might find there. May be worth a look though if you want some extra tonnage.
kdv, you are right about the torpedo depth settings. I ran into a sub net on a raid into Portland one night. Took a look around with the ship cam and noticed some overhead clearance, which worked out nicely because earlier I had spotted a C2 sitting pretty at dock. Figured 1 meter run depth would do the trick and let a couple of eels out. Sure as rain, they glided right over the sub net and sped onward to the target.
Little Uboots, welcome to Subsim.