Oh really? I use coordinates too, but, as far as I know, things have always been divided into sectors and systems. I'm afraid none of those coordinates sound familiar to me, though.

As for Expel, well...it wasn't very well-known when I arrived there anyway, so I guess that's no surprise.

The only thing that sounds remotely familiar is this Sol you mentioned, but only because it's the system Earth is located in. And even then, there isn't anything like a Sol III.

How odd. But I guess that's the norm for this place. Even my friends and I have a hard time matching things up correctly, if you can believe it.