Hello and good evening companse57,
3 days ago I suffered the same. Various destroyers came over me to bomb me up. My escape was, that I was near the ground, 106 meters deep and all machines off. Send my crew to sleep and activated the CO 2 filter. Because my hydrophone was damaged I couldn't hear exactly when they lost pacience and had drained from me. After 20 hrs I had to surface at night and oh luck, the sea was abandoned.
The20 hrs I passed with TC 64.
But I have to admit, that it was the first time, that I could escape this way.
Greetings from Uli