Editing Instrument landing system (section)

===Using ILS===
An instrument approach procedure chart (or '[[approach plate]]') is published for each ILS approach to provide the information needed to fly an ILS approach during [[Instrument flight rules|instrument flight rules (IFR)]] operations. A chart includes the radio frequencies used by the ILS components or [[Navigational aid|navaids]] and the prescribed minimum visibility requirements.

An aircraft approaching a runway is guided by the ILS receivers in the aircraft by performing modulation depth comparisons. Many aircraft can route signals into the [[autopilot]] to fly the approach automatically. An ILS consists of two independent sub-systems. The localizer provides lateral guidance; the glide slope provides vertical guidance.