What components make up a typical ILS approach?

A typical Instrument Landing System (ILS) approach consists of three main components: the localizer, the glideslope, and marker beacons.

The localizer provides horizontal guidance by transmitting signals that indicate the aircraft's position relative to the centerline of the runway. This is crucial for ensuring that the aircraft is properly aligned for landing, especially in low visibility conditions.

The glideslope offers vertical guidance, helping pilots maintain the correct descent angle towards the runway. It ensures that the aircraft approaches the runway at an appropriate angle, which is vital for a safe landing.

Marker beacons serve as reference points along the final approach path. They indicate the distance to the runway and further assist the pilot in understanding their position relative to the landing zone.

These components work together to provide precise navigation guidance during an approach, helping ensure that the landing process occurs safely and accurately. The other options listed pertain to different aspects of aviation but do not define the core elements of an ILS approach.