Hello Stevepine, welcome back to Silent Hunter and Subsim
Very good adives here above. In short: you don't need to bother with other mods when installing TWoS which I highly recommend.
To install TWoS, be sure to update your SH5 game to version 1.2.0 before.
For the Hydrophones, I know that Vecko (the TWoS mod author) has edited their data for them to be more realistic judging the readmes inside the files.