Hydrophone ships sounds?

[Fifi]

Ahoy captains,

I’m experiencing strange thing in Ralles Real Mod Soup.
I didn’t noticed before, but i can’t hear any sound in hydrophone for some ships...
For sure, the Akita Maru and the Kinposan Maru doesn’t have any hydrophone sound that i can hear.
My sonar guy can hear them though...

I re-installed fresh game, and re-installed the Ralles Real Mod Soup without success, as those boats still doesn’t have sounds on my rig.

So my questions are:

- is there a file somewhere, where i can check if those boats have effective hydrophone sounds?
(In other words, where are the hydrophone ships sounds?)

- other Ralles mod players experienced this?

I know Bleiente isn’t here anymore, but i don’t want to subscribe on other forum...in German language furthermore...

Thanks for help