Air traffic management systems and technology
Learn about the advanced technologies and innovative systems CAAS uses to manage air traffic efficiently and safely in Singapore.
Last updated 9 May 2026
Managing approximately 696,000 aircraft movements annually, CAAS as an air navigation service provider develops and implements the latest systems and technologies to ensure safe, efficient and expeditious air traffic flow.
Here are the systems used by CAAS:
Air Traffic Management System (LORADS)
The Long Range Radar and Display System (LORADS) is Singapore’s core air traffic management system.
Air traffic controllers use LORADS to manage and monitor aircraft in real time. LORADS helps ensure that air traffic is handled safely and efficiently as traffic volumes grow.
Singapore first adopted the LORADS in 1981, when Changi Airport began operations.
To stay ahead of rising air traffic demand and evolving operational needs, we continuously upgrade and enhance LORADS.
A key milestone was the introduction of LORADS III in 2014, a next-generation system developed by Thales. LORADS III marks a significant leap in our operational capabilities and system robustness.
Key benefits
a paperless, highly automated and integrated environment
technologies and innovative features with enhanced aircraft navigational accuracy and functionality
increased traffic handling capacity
a comprehensive air situation picture through the fusion of data from multiple surveillance sources
unprecedented layers of safety nets and redundancies
Advanced Surface Movement Guidance and Control System (A-SMGCS)
A-SMGCS is a modular system that:
locates and identifies aircraft
provides routing guidance for aircraft and airfield vehicles on runways, taxiways and aprons
The system improves safety and the efficiency of movements on the airport surface under all weather and visibility conditions.
A-SMGCS supports aerodrome air traffic controllers working at runway and ground positions in managing surface movements in a safe, orderly and efficient manner.
Key benefits
improved safety through tracking and conflict detection within the aerodrome in all weather conditions
enhanced situational awareness with precise positions of all surface movements displayed to controllers
routing and guidance that support decision-making and reduce stress and the potential for human errors during busy periods
more efficient ground movements that reduce fuel burn and aircraft emissions
Airport Collaborative Decision Making (A-CDM)
A-CDM is a framework and system that connects airport operators, airlines, ground handlers and air traffic control. Through shared access to real-time operational data, airport capacity and operational efficiency are optimised.
A-CDM supports airport partners involved in aircraft turnaround and ground operations.
When all partners share the same data and timelines, they can make collaborative and accurate decisions that improve the efficiency of airport operations.
With A-CDM, Air Traffic Controllers receive accurate predictions of an aircraft’s readiness for departure based on real-time updates from ground handlers and airlines.
An optimal departure sequence can be planned, reducing taxi-out and waiting time at the runway holding point and resulting in fuel savings for airlines.
Key benefits
better coordination among airport partners
improved situational awareness for decision-making
more efficient operations
reduced unnecessary fuel burn while idling at runway holding points
ATS Inter-Facility Data Communication (AIDC)
AIDC automates routine coordination between Air Traffic Service (ATS) units across different countries and regions.
Air Traffic Controllers use AIDC to automate the exchange of routine coordination digitally, reducing reliance on more error-prone methods such as manual voice coordination.
Key benefits
fewer communication errors
faster coordination
reduced controller workload