It must be pretty smurfing far out to sea if nobody has been able to see it. Wonder why you can't just go there on the airship? I mean, it would simply be ruined Zanarkand 2.0, but if it's straight up there then easy.

Also, why the hell hasn't anyone else from Zanarkand just sailed out of there? If our own history is anything to go by, humanity wants the entire world charted. And if Spirans are anything to go by, they live smurfing everywhere else. So to have a physical location that is entirely unknown to people despite the existence of giant salvage ships and whatnot seems utterly bonkers.