Voyages of discovery? (spoilers for all RotE books)

[Farseer]

There appear to have been no transoceanic voyages of discovery.

Asked a question kind of relating to this on the Others Island thread...
Where do ships end up when they disappear from the side of Others Island (most likely vanishing due to the proximity of these ships to the Skill pillar used by Fitz and Dutiful or some other, similar means)? Not sure how this would work with non-Liveships though?! Still, this points to there possibly being Skill pillars in regions beyond the currently known Realm of the Elderlings?

The Great Sail Fleet trades with and makes a transoceanic voyage west to Jamaillia every three years however there is no mention (that I know of) of anyone journeying TO the region from where the Great Sail Fleet hails. Is it possible that it is near their shores that the disappearing Others Island ships emerge?

I did have thoughts that Robin would be truly sneaky and create **sort of a Soldier Son trilogy spoiler**

Spoiler

Gernia as a world that would end up somehow proving to be the home of the Great Sail Fleet but obviously this is not the case (though I am still reading the Soldier Son trilogy,

I am sure someone would have said if this was so!).

I am fairly certain that Ephron Vestrit sailed far south to the Spice Isles via a wide path around the eastern side of Others Island, to avoid the Pirate Isles. If this is the case, I wonder why he and other Traders didn't simply journey further due east to trade, if not to 'discover'?

More to add but no time at present !