In a technical bulletin released March 25, 2026, Marlink reported a 50% increase in detected Global Navigation Satellite System (GNSS) interference incidents across its maritime customer base. The surge in jamming and spoofing—primarily concentrated in the Middle East and along high-traffic geopolitical corridors—poses a direct risk to vessel navigation and the stability of satellite communication (SATCOM) antenna tracking.
GNSS signals from constellations including GPS, Galileo, GLONASS, and BeiDou are characterized by low signal strength, making them inherently vulnerable to localized electronic warfare. Beyond traditional navigation, these signals are critical for “satellite acquisition,” the process by which a stabilized maritime antenna identifies and locks onto a satellite. When GNSS data is manipulated, antennas may fail to point accurately, leading to a total loss of broadband connectivity and distress alerting capabilities.
Operational Disruptions and “Spoofing” Tactics
The reported incidents involve both “jamming,” which overpowers the satellite signal with noise to cause a loss of fix, and the more sophisticated “spoofing,” which provides false positioning data to the vessel’s receiver. Recent data indicates that these events are no longer isolated but have become a persistent feature of the maritime operational environment in contested waters.
Marlink’s Network Operations Center (NOC) has observed that incorrect GNSS data can cause antenna control systems (ACS) to move into “search” mode indefinitely. To combat this, the company has issued emergency operational guidance to fleet managers, advising manual position overrides and rigorous data integrity checks when exiting known interference zones.
Mitigation Strategies and Resilience Measures
To address the rise in electronic interference, Marlink is deploying hardware and software updates through its Possibility Portfolio. These resilience measures focus on the integrity of Positioning, Navigation, and Timing (PNT) data used by onboard communications hardware.
- Interference-Resistant Reception: Implementation of multi-element antennas and spatial filtering to nullify the direction of jamming signals.
- Real-Time Anomaly Detection: Software-defined algorithms that identify “jumps” in position or timing that are physically impossible, triggering an automatic switch to inertial or secondary sensors.
- Signal Suppression: Digital filtering techniques to isolate legitimate satellite signals from terrestrial noise.
- Hybrid Connectivity: Utilizing LEO, MEO, and GEO networks simultaneously to ensure that if one frequency band is jammed, the vessel can failover to an alternative orbital plane.
Executive Perspective
“Maritime operators are facing an unprecedented level of GNSS interference in certain regions today,” said Tore Morten Olsen, President Maritime, Marlink. “When positioning is compromised, it can quickly impact both connectivity and safety systems onboard. Our role is to support customers with the insight, guidance, and resilient solutions they need to maintain safe and efficient operations in these environments.”
Outlook: The Shift to Resilient PNT
The maritime industry is increasingly looking toward “Resilient PNT” (Positioning, Navigation, and Timing) frameworks that do not rely solely on space-based signals. Marlink’s roadmap for 2026 and 2027 includes the integration of terrestrial eDLoran and enhanced inertial navigation systems (INS) into its managed service offering. These “zero-trust” navigation architectures are expected to become standard for vessels operating in the Red Sea, Eastern Mediterranean, and Baltic regions by late 2026.
