Finally got my Zubmarine and dived. Holy shit, it's drk down there. And I mean literally pitch black. Everything your lamp doesn't illuminate cannot be seen by you unless it has its own light source.
Also,t he enmies down there are brutal
. Most of these enemies are as strong as some of the mini bosses from the surface (the Neath surface, not the real surface). Except enemies with around 500 hp. I think I need a new ship first to make real big dives, my small 75 hp ship won't last long down there.
I like how well they managed the amtopshere. Both the absence of any light and the muffled soundtrack that sounds like you are really underwater, give the game the perfect atmosphere.