Instead of Ahead Standard, I'd suggest Ahead Slow. This results in less ambient noise from water rushing past the hydrophone sensors. You'll be able to notice fainter sounds.
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100% realism, DiD
Harbor Traffic 1.47(incl. RUB)
Using SH3 Commander to implement many custom realism tweaks
Covered 1939-1945; now restarting in 1939 again.
Completed 39 careers, 210 war patrols, 4.7Mt sunk, 19 subs lost
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