Or rather patch 1.4b 
http://www.silent-hunteriii.com/uk/home.php
Fixes the mute hydrophone-man and also adds quite a bit of interesting stuff (harbour traffic!)
Alaaaaaaaaarm!!!
Auf Seehrorhrtiefe gehen! Boot durchpendeln! Rohr 1 bis 4 bewässern! 
Aint seen any new harbour traffic yet, lots of gaudily coloured cranes though.
Glad the sonar man has been fixed… (He was a deef and dumb boy!! It’s a miracle!!)
I think I’m going to have to do a re-install, I put so many mods on, I should’ve used mod manager…
Does this go straight over 1.2, or do I have to go to 1.3 first?
I know - RTFM…
It even goes straight over v1.0