Ceiling hights to ocean depth

I don’t know the convertions, of ceiling hights cut off to ocean depth cut off using Unreal engine 4 at the moment, i am trying to learn as much as i can as i am building destop pc, probably when i finish doing it their be Unreal engine version 4.20.

okay so in this world we live, there is a Mountain call Mt Everest 29,002ft, would be great if Unreal engine 4 could boost the hight altitude hights up to 30,000 ft, and ocean depth to the crushing depth of the Mariana trench 36,070 ft its only a idea.:cool: