Playable Submarines
- United States S class submarine
- United States Porpoise class submarine
- Salmon class submarine
- Sargo class submarine
- Tambor class submarine
- Gato class submarine
- Balao class submarine
- German Type IX submarine (U-Boat Missions add-on)
- Type XVIII U-boat (U-Boat Missions add-on)
Read more about this topic: Silent Hunter 4: Wolves Of The Pacific