RIPTIDE trials boost maritime navigation resilience in the Black Sea

As global shipping grows ever more dependent on satellite navigation, the vulnerabilities of GNSS have become a pressing concern. From commercial cargo vessels to smaller non-SOLAS ships, maritime operations rely heavily on PNT data for safety and efficiency. However, GNSS signals remain inherently fragile—susceptible to both accidental interference and deliberate jamming or spoofing. With low-cost interference devices and AI-driven signal generation tools now widely accessible, the risks are escalating, particularly in areas affected by overlapping military activities.

RIPTIDE aims to tackle this challenge head-on in one of Europe’s most sensitive maritime regions: the Black Sea. Developed under the European Space Agency’s NAVISP Element 3 program, RIPTIDE PHASE 2 has demonstrated a novel “monitor-and-protect” architecture designed to enhance the resilience of civil maritime PNT services.

Rather than relying solely on GNSS, the system integrates multiple complementary layers. These include real-time GNSS radio frequency interference monitoring, alternative positioning through VDES-R (VHF Data Exchange System - Ranging), and the secure distribution of authenticated GNSS navigation messages via AIS/VDES application-specific messages. This approach makes optimal use of existing maritime infrastructure while adding redundancy and trust mechanisms.

RIPTIDE is led by the GMV team in Romania with support from GMV UK. The project also involves partnerships with the Maritime Hydrographic Directorate and the Romanian Space Agency Research Centre.

Field trials in the Black Sea tested a demonstrator under both nominal and interfered conditions. VDES-R performed strongly as an alternative positioning source, achieving position errors of less than 10 meters in cases with adequate geometry and signal power.

Future phases will address independent VDES-R synchronization, extended coverage, and additional features, laying the groundwork for full operational deployment.

This work is carried out under the European Space Agency’s Navigation Innovation and Support Program (NAVISP).