Overview On **November 6, 2025**, a technical glitch in the Air Traffic Control (ATC) messaging system at Delhi Airport led to significant disruptions, including delays and cancellations of flights. The Ministry of Civil Aviation, along with key agencies, responded to rectify the issue and prevent future occurrences. This incident underscores the critical importance of robust and resilient infrastructure for air travel. Key Developments Initial Incident and Response The technical glitch occurred on the afternoon of **November 6, 2025**, and continued into the morning of **November 7, 2025**. This resulted in the delay and cancellation of **46 flights**, causing inconvenience to passengers. Immediate Action: Teams from the Airports Authority of India (AAI), Air Navigation Services (ANS), and Electronics Corporation of India Limited (ECIL) were immediately mobilized to identify and rectify the problem. ECIL Support: ECIL promptly deployed additional technical manpower to assist in the restoration process. Manual Operations: During the system downtime, ATC staff efficiently managed flight operations manually to ensure passenger safety and minimize inconvenience. Ministerial Review and Directives Late on the night of **November 7, 2025**, Union Civil Aviation Minister **Shri Rammohan Naidu** visited the Delhi ANS Centre to review the situation. He was accompanied by senior officials, including Secretary (MoCA) **Shri Samir Kumar Sinha** and Chairman (AAI) **Shri Vipin Kumar**. ECIL CMD Directive: The Minister directed the ECIL CMD to deploy additional technical manpower to expedite the restoration efforts. ATC Staff Augmentation: To minimize passenger inconvenience, the Minister also directed that more ATC staff be deployed at Delhi Airport to support manual operations and ensure smooth handling of air traffic during the system downtime. System Restoration and Follow-up Through coordinated efforts, the system was fully restored to automatic mode by the afternoon of **November 8, 2025**. There were no flight cancellations on this day due to the issue. Ministerial Visit: Later in the evening of **November 8, 2025**, **Shri Rammohan Naidu** visited the ATC Tower to review normalized operations and appreciated the commitment of the teams that worked overnight to resolve the issue. Root-Cause Analysis: The Minister has directed that a detailed root-cause analysis be undertaken to prevent recurrence of such glitches in the future. System Advancements: Officials were instructed to plan for more system advancements, including additional or fallback servers to strengthen ATC operations. UPSC Relevance This event is relevant to the UPSC syllabus as it touches upon critical infrastructure, technology, and governance. The incident and the government's response highlight the importance of resilient systems and effective disaster management. GS Paper Topics GS3: Infrastructure: This incident directly relates to the aviation infrastructure and the importance of its smooth functioning. GS3: Science and Technology: The technical glitch and the efforts to restore the system involve technological aspects of air traffic control. GS2: Government Policies: The government's response and directives reflect its policy approach to managing critical infrastructure and ensuring passenger safety. Potential Exam Questions Discuss the challenges in maintaining and upgrading critical infrastructure like air traffic control systems. Evaluate the effectiveness of the government's response to the ATC system failure at Delhi Airport. Analyze the role of technology in enhancing the resilience of air transportation infrastructure. Important Facts The ATC glitch occurred on **November 6, 2025**. **46 flights** were affected by delays and cancellations. Key organizations involved: **AAI**, **ANS**, and **ECIL**. The system was restored by **November 8, 2025**. A root-cause analysis has been ordered to prevent future incidents.