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RMI: Key measures to mitigate impacts of GNSS interference – Safety4Sea

by | Oct 11, 2025 | Blog

Image: YouTube Capture

What’s new: Among a flurry of recent reports about greatly increased GNSS interference at sea, the Republic of the Marshall Islands Registry has published some best practices for safe navigation.

Why it’s important: GNSS interference has resulted in collisions, oil spills, vessels unintentionally violating territorial seas, and in some cases being seized. Worse outcomes are also possible such as the loss of life, the loss of vessels, etc.

What else to know:

  • The Marshall Islands is has the world’s third largest ship registry (4,500 vessels) after Liberia (4,900) and Panama (5,100).
  • The registry has long been very active supporting and advocating for mariners.
  • The article also includes the registry’s regional threat assessments which are interesting.

 

RMI: Key measures to mitigate impacts of GNSS interference

by The Editorial Team
 October 7, 2025

Republic of the Marshall Islands Maritime Administrator has issued guidance regarding the rising risks of GNSS interference in key maritime regions and recommended measures to mitigate navigational and safety impacts.

As explained, these forms of interference, often linked to geopolitical tensions and electronic warfare activities, disrupt positioning, navigation, and timing information, potentially leading to navigational errors, operational delays, and safety hazards. Incidents of Global Navigation Satellite System (GNSS) interference have surged since 2022, with reports of thousands of vessels impacted in 2025. Vessel operators are urged to:

  • Implement redundant navigation protocols
  • Report incidents promptly
  • Consult updated navigational warnings from authorities such as the United States (US) Coast Guard Navigation Center (NAVCEN) and the North Atlantic Treaty Organization (NATO) Shipping Centre (NSC)

Regional threat assessments

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