Yeah, there are two of those systems iirc... Just use FL datastorm or something to record the exact coords of jumpholes in that system and then have fun searching a bit ;-)
When you see the nomad lair (the giant donut) you can usually find an exit if you fly along the edge of the asteroids with the lair practically flat in your viewscreen. Stronger scanners are useful here.
because, it would add flavor...
think it would be awesome with maybe a few more systems with one sided jumpholes and such (the one from sigma 13-chugoku)
also, why does the navmap fail?
i mean, your scanner is working, and its not like the maps are supposed to be outside content....
you need to scan stuff to have the map of them