What is the function of a glide slope indicator?

The primary function of a glide slope indicator is to assist in maintaining the correct descent angle when approaching a runway. It is an essential part of the Instrument Landing System (ILS) and provides vertical guidance to pilots during the landing approach. The glide slope indicator ensures that the aircraft is on the proper path for landing, typically indicating whether the aircraft is above or below the ideal glide path to the runway. This information is crucial for achieving a safe and stable descent profile, allowing for precise landings under various weather conditions.

Understanding the glide slope is vital for safe operations, especially in low visibility situations where visual references may be limited. Proper descent angles are critical for maintaining safe separation from terrain and obstacles surrounding the airport, making the glide slope indicator a key tool for instrument-trained pilots.