GNSS Spoofing Threatens Delhi Aviation

Overview of GNSS Spoofing Incident Over Delhi

Introduction and Context

• Event: GNSS spoofing incidents over Delhi in early November 2023, affecting aircraft navigation systems.
• Nature of Spoofing: Misleading GPS signals resulted in erroneous navigation data, including false terrain warnings.

Government Inquiry and Regulations

• Inquiry: Ordered by the National Security Council Secretariat (NSCS) headed by National Security Adviser Ajit Doval.
• Stricter Protocols: Directorate General of Civil Aviation (DGCA) implemented new Standard Operating Protocols for reporting spoofing events within 10 minutes.

Nature and Impact of Spoofing

• Aircraft Affected: Reports of spoofing from multiple pilots (Air India and others), with incidents occurring frequently within 60 nautical miles of Delhi.
• Safety Concerns: Although GNSS spoofing doesn't immediately endanger aircraft due to redundant systems like the Inertial Reference System, it can pose severe operational difficulties.
• False Alerts: Increased workload for pilots due to navigation discrepancies and erroneous warnings.

Statistical Data and Incidents

• Frequency of Incidents:
  • 2023-2024 Data: An average of 300 flights per day experienced spoofing by January 2024, escalating to approximately 1,500 flights daily by August 2024.
  • Specific Period Analysis (July 15-August 15, 2024): 41,000 flights subjected to spoofing, Delhi reported 316 incidents, ranking among the top 10 global regions for spoofing.
  • National Reports: 465 GPS interference incidents in border regions (Amritsar and Jammu) from November 2023 to February 2025.

Increased Global Context

• GPS Spoofing in Warfare: Notable increase in usage of GNSS spoofing by military units targeting hostile assets, indicating a shift towards modern warfare tactics.
• International Examples: European Commission noted GPS disruption during a plane landing in Bulgaria attributed to Russian interference, part of a broader trend of alleged hostile actions.

Judicial and Regulatory Framework

• International Aviation Law: IATA emphasizes that international law forbids targeting civilian aircraft, calling for enhanced protections and protocols.

Policy Proposals and Recommendations

• IATA's Multi-Faceted Response: At the UN aviation safety assembly, proposals included:
  • Standardized reporting mechanisms.
  • Improved international cooperation and information sharing.
  • Enforcing regulations on jamming devices.
  • Development of advanced detection systems.
  • Promoting resilient GNSS receivers by avionics manufacturers.

Conclusion

The recent surge in GNSS spoofing incidents, particularly over significant urban areas like Delhi, raises considerable safety concerns for civil aviation. The government's prompt response through inquiries and strict reporting protocols aims to enhance aviation security. However, ongoing incidents underscore the urgent need for comprehensive international strategies to safeguard the integrity of global aviation systems.