What kind of navigation system would you primarily use for precision landings?

An Instrument Landing System (ILS) is the primary navigation system used for precision landings because it provides highly accurate lateral and vertical guidance to pilots as they approach the runway. ILS utilizes radio signals and often includes both localizer and glideslope components. The localizer provides horizontal guidance aligned with the runway centerline, while the glideslope gives vertical guidance to ensure that the aircraft descends at the correct angle.

The precision offered by ILS makes it suitable for low visibility conditions and allows for approaches with a very low decision height. This capability is critical in ensuring a safe landing, especially in adverse weather conditions where pilots rely on instrument-based navigation.

In contrast, other navigation systems like NDB (Non-Directional Beacon), VOR (VHF Omnidirectional Range), and TACAN (Tactical Air Navigation) are not primarily designed for precision landings. They provide less accurate navigation guidance and are typically used for en-route navigation or for initial approach phases rather than the final stages of landing. Therefore, ILS is the go-to system for precision landings in aviation.