One of the curious things is that it has land outlines of Antarctica, which probably wouldn’t have been possible for 10,000 to 12,000 (when the last big ice age ended). So it would suggest seafaring men existed...more than 12,000 years ago.
There is a book out called “Maps of the Ancient Sea Kings”. That postulates the existence of sea faring civilizations at least at the Minoan of early Phoenician technology level in the Indian Ocean & Indonesian island area. Some say they may have been in existence prior to the last major transcontinental glaciation the maps are a relic of their existence.
Some say that it accurately shows the outline of land without ice cover. Others counter that it shows the coast of South America, just bent around to match the shape of the paper (i.e. it's too long to fit so they bent it). One might ask why they wouldn't just get a bigger sheet of parchment rather than intentionally warp a map intended for navigation though.
So it would suggest seafaring men existed...more than 12,000 years ago.
Color me skeptical.
Antarctica costal area was ice free 14,000,000 BC