Hey, I found out how to set the Hydrophones Sensitivity from deaf to infinite. It is really easy. It was discovered based upon changing one line at a time inspired by all you guys, CB and all's work. (plus 12 hours of testing).
Sim.cfg
[Hydrophone]
;Detection time=1 ;[s] Stock one second is pretty fast.
;Sensitivity=0.03 ;(0..1) Who knows. Nothing gained here.
;Height factor=0 ;[m] Depth? harder to detect? Needs testing.
;Waves factor=0.5 ;[>=0] Rough weather makes for harder detection.
;Speed factor=15 ;[kt] Destroyer speed, higher the worst detection. Above this no detection.
Noise factor=0.1 ;[>=0] 1.0 Sensitivity for speed sub noise. Lower is higher.
Setting the Noise Factor from default 1.0 to a lower number towards zero will make the Sensitivity to your Uboats speed noise and silent running go to infinite as you aproach zero. Also going higher than 1 makes it become deaf. no other change. I made comments on what the other values seem to do.
So Noise Factor set at 0.1 you must move at below 3 knots at silent running at 4 km. Within 500m you must be SR and zero speed.
I disabled the DD active sonar for these test! Only passive at work here.
Set it at 0.5 you can move at 4 knots without silent running out to 2 km of DD.
Set for 1.0 for normal.
I commented out the other factors for now.
Yeh!
There you go.