So I'm going to go with some hyper-simplicity here. Although I'm not sure about execution. Probably need multiple Commanders. Not discounting the 4 'corner' symbols - I haven't managed to shoehorn them into this idea yet, although if it looks like it has merit, maybe somebody else can.I agree. It's a self-contained package. Just like the morse - both when it gave the nearest body's name; and latterly the ship diagram.
Anyway: What if it's more of a 'clock' than a 'map'? Can we 'read the clock' from the positions of Merope 5, it's moons and/or Merope itself?
Which is why I am thinking multiple Commanders.
I was going to expand on this line of thinking, but I'll wait and see if it has legs first...