"
DD: Silent Hunter IV aims to give an accurate representation of the US submarine campaign against Japan. Taking both this, and our own development schedule, into consideration, we chose the most representative US fleet boat classes: P-class, Tambor, Salmon, and Gato. Of course, each of them will come with several development variations."
Does this mean there will be no Balao class submarine and or Tench class ?

Or is the Balao a "development variation" of the Gato?:hmm:
Save the Balao!! ^^