To reply to your earlier post - there isn't any LoD, it just draws everything within about 200km of you, or whatever the range is that gives some chance of it showing on the horizon. I can afford this, as the land has a resolution of about 5km.
HOWEVER - the way travel acceleration works is that it leaves you moving at the same speed through your own patch of ocean, and instead just moves all the land around you, at high speed in the opposite direction. So the game usually takes place near to the centre of the initial coordinate system, and I'm not sure what happens if someone sails in the same direction for very long in real time. It's possible you could sail out of the world. (On the other hand, I only put stars in recently. They should stay around the ship.)