The discovery scanner should provide a complete list of items (body types, biology types, interesting features) in a system, and the Full Spectrum System Scanner and Detailed Surface Scanner should be solely for locating already identified items, and maybe providing a few more minor details. The FSS is far too fiddly to be using as our primary discovery tool and should only be mandatory for actually locating things once we've determined via the Discovery Scanner that the system is worth spending time on.