The lack of sound when using the Hydrophone yourself is a Stock game issue. Your Sonar man will hear everything, alert you of detected targets, but when you go to the Hydrophone station to check yourself...….you're deaf as a post!
Not all ships though, some will be heard, but most won't.
The trouble becomes
really bad when a modded game has changed the ship units speed in their waypoints (as both TMO and RSRDC have done). The Stock game rarely has ship units traveling below 9 kts in their mission files. TMO and RSRDC have them changing speeds all the time......some to 1 or 2 knots speed just to "mix it up". When this happens the preset Engine parameters for each ship won't let the engines sound to be heard at these lower slow speeds. Poof, no Hydrophone sound for you.
Fotrs Ultimate has fixed the problem. It's the only "actively modded" game modification that's still being worked on...…...correcting things like Hydrophone deafness; missing AA/Deck Gun upgrades; working Radar; plus adds things like the largest modeled inventory (planes/ships) of ANY mod for SH4; Enemy/Allied AI controlled subs; Capital warships having seaplane patrol craft; AI fired torpedoes. Little stuff, big stuff. Yes, it's a "shameless plug" for the Ultimate mod, but it's the truth!
