Hey
Just been prepping Under a Black Sun for my Group to play and wanted to ask for what your Interpretation of the "Sectors" mentioned in the Adventure are.
Example: The Umbra Club is mentioned to be in Sector 1459, while the Kerelium Factory is in Sector 943.
My interpretation is that this could well be Levels (which in turn would make the players cover a lot of ground).
I find this kind of cool, but just wanted to hear how you have interpreted this.