FussionCore

We want submarines! A class for itself, there are so many they can start at the same level as DDs or one level below (IV or V). Subs can fight each other and can torp ships. Ships can kill them using depth charges. When submerged, they become visible at some distance (like ships in the smoke). They can't stay submerged indefinitely, and when they are out, they can use guns. They can have the active sonar to detect other subs (consumable, like radar)...