How many units deep does water need to be for subs to fully submerge? It looks to be only a few units, if the official maps are anything to go by.

It's been over 12 months since I was still editing but my guess is 3 units.

I'll probably make my water just 6 or 7 units deep at most then. I tried 10 before and it was WAY too deep, so yeah. Thanks. (: