Diplomatic tension over Great Sea Interconnector maritime research

The French-flagged research vessel Abeille Marengo departed from the port of Heraklion to conduct seabed surveys for the Great Sea Interconnector (GSI) project, an energy infrastructure initiative connecting Greece and Cyprus. Following its departure, a diplomatic standoff emerged as Turkey issued a NAVTEX (1127/26) on November 10, claiming the research occurs within Turkish continental shelf waters and with Ankara's consent.

Greece and Cyprus rejected the Turkish assertions, with the Heraklion NAVTEX station labeling the Turkish notice "invalid and void" via NAVWARN 1441/26. Nicosia followed with its own anti-NAVTEX (352/26), issued by the Larnaca Joint Rescue Coordination Center, clarifying that all research activities are conducted solely under Greek and Cypriot authorizations. Cypriot Defense Minister Vassilis Palmas affirmed the project's geopolitical importance, noting that the vessel is expected to enter the Cypriot Exclusive Economic Zone around November 19.

While Turkish media outlets like Türkiye Today claim Ankara sent a formal diplomatic note to France asserting its rights, Greek and Cypriot officials maintain that the research complies strictly with international law. The mission represents a critical step for the completion of the energy link by 2031, with the vessel currently conducting equipment calibration before proceeding to the designated survey sites near Kasos and Karpathos.