1. Go deeper. Watch via scope distance to the bottom.
2. Enable silent run.
3. Set speed to ahead slow.
4. Switch to sonar station.
5. When you hear splash of the depth charge, set speed to flank.
6. When you hear explosions, change your course about 20-30 deg port or starboard.
7. A few seconds after last explosion, set speed to ahead slow.
8. Go to point 5.
It works for me, especially in '39. Good luck.
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