Maximum dead zone depth

[Tsunami1500]

I download Sunautica for PS5, just to see what it like, well lets look at the dead zone, a massive trench, i built a massive habitat with many room, obsvation room looking out the void, 2 moon pools, so i

 

traveled,in the seamoth to see how deep i can go 27,000 FT 8.1 km deep nearly deep of the Marianars trench or the challengers deep, i cant reach the bottom, i try game dumps me back to surface