Oh my god I'm trying to render something in Kerkythea and well the size of the ship (size of the ship not the file) is pretty big like 6km long and I don't see anything in KT. I open the file and all I get is a grey screen with no ship or anything.
The point is that you've probably made the ship itself that size; if you're not sure, check the box in the lower right corner when you're making a single line from one end of the ship to the other. I myself position the ship itself in the correct angle while in SketchUp, to avoid having to work within Kerkythea because it's revolving tool just sucks. When all else fails, there's a buttin in Kerkythea to go back to the last view you selected