The beginning would be set up as a line of towers in space past that line you would use D scan to see mines that are cloaked, detect a pathway using D scan to get past the area if you get too close the mine appears and explodes.
I was thinking of this as a countermeasure for protecting bases or areas in High traffic space.
D-scan doesnt show you the location or exact distance of objects. The only way you would use D-scan for sigs is to scout if there is someone that could possibly be there before you. And even then, its not absolute. You would not use D-scan to search for sigs. Infact, I dont even know if thats possible.
The only way this mine placing and mine-searching method would work with D-scan, is if you set it at a small angle and short range. And yes, almost no one uses this in a 3-dimensional method. You would literally have to set D-scan as a small cone in front of your ship, and slowly maneuver forward. I dont even know if its plausible to do so.