TLDR version: air ships.
Okay I read the entirety and there are some parts I agree with and some that seem far-fetched, but I currently don't have the time to elaborate further
When you get some time, definitely let me know, and I'll see if I can clarify some stuff if need be. This theory is actually an off shoot, of a much more detailed theory linking One Piece and Final Fantasy, which puts things into better perspective. I have that archived too, if anyone is ever interested in reading it.