Apparently, AI galleys can teleport!

[schwartz]

I wonder how that got there?!

EDIT: If it's not clear, Charlemagne somehow has a galley on the coast, this island is completely surrounded by ocean tiles and I'm the only one with cities there..

 

[MrCynical]

Check he doesn't have astronomy. All ships can cross ocean tiles once the civ has that tech.

 

[schwartz]

Check he doesn't have astronomy. All ships can cross ocean tiles once the civ has that tech.

He doesn't. I had a monopoly on astro at the time..

 

[schwartz]

Actually, now that I think about it...
Is it possible that his galley got kicked out of Alexander's land (NW, see map) and this was the nearest available coast tile?

 

[MrCynical]

Theoretically a galley can be teleported out by loss of open borders and end up on an otherwise inaccessible island - I've seen it happen once. It looks a little unlikely on this map though. It would have to be the closest tile that wasn't either ocean or in the closed borders of a civ.