Mein Gott! I can't even sink a ship against TS-37

[BROJD]

Too many of my careers have come to untimely ends when I've faced escorts, especially against convoys, so I decided to give a few of the individual missions a shot so that I could become proficient at difficult attacks.

I'm running GWX (realism 54%) and have tried to take on Convoy TS-37, a big fat convoy with three little escorts.

The mission starts just a few thousand yards in front of the convoy, at periscope depth, all stop, with the periscope down.

Yet, somehow, every time I start, the lead escort (which is probably 1500 meters off, at least) always turns about 70 degrees to starboard and makes a beeline straight toward me. DCs are falling within 5 minutes of the mission starting without me doing a single thing.

Has anyone played this mission? Did GWX just get it out of balance and start me too close to the escorts? And how the heck do they hear me when I'm completely silent?