Detailed Surface Scanners (DSS) have an innate +20% Probe Radius. Cmdrs that had either of the 3 engineering effects on their DSS prior to the update will have that effect converted to additional Probe Radius (max of +30% at Rank 5 for a difference of 10% between unengineered to engineered, which shows as a 50% bonus to the original 20%). This of course helps with planet mapping, and some planets can't have the probe goal met without this mod.