Since the FAA was only able to cram five thousand and one pieces of info onto your sectional chart, they decided that they wanted to give you even more information and they thought the best way to do this was through a Chart Supplement (note: the Chart Supplement used to be called the AFD or Airport Facility Directory, it’s the same exact document, but we have a new name for it. Please use the proper name of Chart Supplement when referring to it).
The helpful info you will be able to find on a chart supplement includes: