Airport Runway Instrument Landing Indicator

Airport Runway Instrument Landing Indicators are devices used to assist pilots in landing an aircraft safely during low visibility conditions. They are part of the supply class Flight Instruments, which includes instruments used for navigation, control, and monitoring of an aircraft during flight.

In the supply group Instruments And Laboratory Equipment, these indicators are categorized as instruments used specifically in airport operations. They are designed to provide visual guidance to pilots during the final approach and landing phase of a flight.

The Instrument Landing Indicator (ILI) is typically located at the side of the runway and consists of a series of lights that provide visual cues to the pilot. These lights are arranged in a specific pattern, known as the glide slope, which indicates the correct descent path for the aircraft.

The ILI uses a combination of white and red lights to indicate whether the aircraft is above, below, or on the correct glide slope. When the aircraft is on the correct glide slope, the lights appear white. If the aircraft is too high, the lights appear red, and if the aircraft is too low, the lights appear red and white.

By following the guidance provided by the Instrument Landing Indicator, pilots can maintain the correct descent path and safely land the aircraft, even in poor visibility conditions such as fog or heavy rain. This enhances the safety and efficiency of airport operations, allowing for more reliable and consistent landings.