After testing, if I am at periscope depth and on 2 nts, the boat slowly rises until the tower is out of the water. I must use 4 nts to maintain depth.
This is going to be a problem if I am under attack from above, if I am at depth, trying to sneak away silently doing 2 nts, I am slowly going to rise to the surface. This is not good. Am I over thinking this, or have I missed something?