French research vessel resumes subsea surveys for Great Sea Interconnector project

The research vessel Abeille Marengo, chartered by the French company Nexans, departed from Heraklion on November 10, 2026, to conduct subsea surveys for the Great Sea Interconnector (GSI) electricity link between Greece and Cyprus. As the vessel performs equipment calibration before heading toward the survey area near Karpathos, tensions have emerged over conflicting maritime navigation notices. Ankara issued NAVTEX 1127/26, claiming that its consent was obtained for the surveys, a narrative promoted by some Turkish media outlets as a confirmation of Turkish sovereignty in the region.

In response, both Athens and Nicosia have issued formal anti-NAVTEX notices, dismissing the Turkish claims. The Cyprus Rescue Coordination Center (JRCC) emphasized that the research activities are authorized under license 05/2026 of the Republic of Cyprus and that the Larnaca station remains the only legitimate authority for issuing such notices in its area of responsibility. Cypriot Defense Minister Vasilis Palmas reaffirmed the determination of both nations to proceed with the GSI project, describing it as a high-value geopolitical and energy initiative for Europe.

The vessel is expected to reach the international waters of the target area by November 12 or 13, with surveys currently planned to continue through early 2027. Greek and Cypriot officials maintain that they are acting in accordance with international law and the Law of the Sea, asserting that they are not required to seek approval from third parties for their bilateral cooperation.