Alot of these are sarcastic jokes, which it what this whole thread is.
Submarines are the most durable class of ship in this game.
1There are only 2 weapons that can attack them while underwater. One of which can only be used on top of the submarin
2They only have to surface during certain times and smart players will be far away while doing so.
3while surfaced theyre small targets with a level of hull points superior to some heavy cruisers
4they become invulnerable and invisible while using their Transdimensional Ghost Dive.
5while underwater the only ships that can see them are Frigates, Destroyers, and Light Cruisers when equipped with Sonar Crewmen.