Page 56 - 인천국제공항 4단계 건설사업 건설지 [화보집 영문]

Safe and accurate aircraft

operations

Construction of navigational aid (NAVAID) and Integrated Information and
Communication System (IICS)
A navigational aid (NAVAID) is a necessary, key facility for safe aircraft operations. In Phase 1, the Instrument
Landing System (ILS), markers, air traffic control communication facilities, airfield lighting system, radio
detection and ranging (RADAR), and meteorological facilities were built.
Instrument landing facilities and marker systems incorporate the latest digital technologies to meet international

standard specifications such as those set by the International Civil Aviation Organization (ICAO) and the
Federal Aviation Administration (FAA). Additionally, they feature self-diagnosis and monitoring functions to
enhance reliability, safety, and availability. Notably, the Instrument Landing System (ILS) is equipped with a
CAT-III grade, enabling stable takeoffs and landings under visibility conditions as low as 200 meters, ensuring

runway operational stability. Airfield Lighting Systems, such as the Approach Lighting System (ALS), Precision
Approach Path Indicator (PAPI), and Runway Touchdown Zone Lights (RTZL), are also installed in the airside
area to support aircraft takeoffs and landings and ground movements.
The air traffic control communication facilities were built as independent systems to ensure safety and security,

and the airfield lighting system, which assists with aircraft takeoffs and landings and ground movements, was
installed throughout the airside area. Additionally, for air traffic control and precision aircraft approaches,
Airport Surveillance Radar (ASR) / Monopulse Secondary Surveillance Radar (MSSR), Automated Radar
Terminal System (ARTS), and Airport Surface Detection Equipment (ASDE) were established.

For meteorological facilities, the Automatic Weather Observation System (AWOS), which observes basic
weather elements such as wind direction, wind speed, temperature, and air pressure, was installed. Furthermore,
advanced weather systems such as The Low-Level Wind Shear Alert System (LLWAS) and the Terminal

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