Every few weeks, the FAA redraws the invisible lines planes follow to land and take off

The Federal Aviation Administration regularly updates the specific flight paths and safety rules for planes landing and taking off at various airports. These changes happen because of new navigation technology, new buildings, or shifts in air traffic needs.

These are the invisible rules that govern how planes fly. Every time a new building goes up near an airport, or a new GPS system becomes available, the FAA has to redraw the maps and procedures. This ensures planes can still land safely and efficiently, even as the physical world and available technology change.