Oh, I see, at least I think I do.
You would like the range from system to system?
From my own experiments, it only operates within a system.
Selecting a object within the system will give range and co-ordinates from that object within that particular system
It would be nice to know the range from system to system. It would be nice for warp openers.
Which does bring up a question, is there a way of determining the distance between systems? Maybe this is your question too?
Like it does take a lot of time and resources to build a ship which has a gravitational quantum resonator thinking it will reach a certain destination only to find out it does not when completed (and you discover you need a GQR of the next level).