订阅以下载
No Voices Spoilers

This remove voices lines (and subtitles) that tell you have been detected.

Optionaly you can remove other voices lines that can spoil other stuff like the type of the boat you are looking at(Look the ReadMe)

You will probably need to empty these folders at AppData\LocalLow\Deep Water Studio\UBOAT\
-Cache
-Data Sheets
-Temp

If it's not working on a already saved game you can try to modify your base file (make a backup first)
at Steam\steamapps\common\UBOAT\UBOAT_Data\Data Sheets
Open the Crew.xlsx go to the "statements" calc and look at my file to see what line to change.