The only big mods I use are
SH3 Commander
Real UBoat
Harbor Traffic
Hollywood Advanced RUB version mod
The rest are
Das Boot Background Movie
AIL Particle Mod
AIL Sky Mod
AIL Wake Mod
All Grey Contacts Mod
HFMod Carriers
HFMod Battleships
HFMod Cruisers
Map Loading Screen Mod
Shell Damage Textures
SHIII Flag Mod 2
Marhkimovs Torpedo Textures
Sub Crew v.4
tankeriv Seafloor Mod
Terrain Upgrade v2
Bordinstrumente mod
CA Officer Icon Mod
Camera mod v2
Hi Rez Moon
Type941 Mega Liner/Transport/AuxCruiser Mod
HMS Ceramic
SpotLights on merchants and planes mod
FUBARS Submarine skin Mods
I think thats all of them...may be a few other graphics addons in there somewhere..my game is so modded I dont think there is much original content left