Great Sea Interconnector research surveys commence amid diplomatic activity

The research vessel Abeille Marengo is scheduled to depart from Heraklion, Crete, to begin a six-month seabed survey for the Great Sea Interconnector (GSI) project, which aims to link the power grids of Greece and Cyprus, with future plans to include Israel. The Greek navy issued a maritime notice (NAVTEX) effective from November 6, 2026, to March 6, 2027, while a corresponding Cypriot NAVTEX will come into force on November 19, 2026, for operations within Cyprus's Exclusive Economic Zone.

Greece and France have emphasized that the project is authorized exclusively by Greek authorities, following a formal request by the French company Nexans. To manage potential regional tensions, France sent a note verbale to Turkey and Egypt regarding the surveys. Officials in Athens and Nicosia clarified that this communication was purely informational and did not constitute a request for permission, despite Turkish counter-NAVTEX filings claiming jurisdiction over parts of the route.

The United States has engaged in diplomatic efforts, reportedly conveying a message to Ankara, Nicosia, and Athens that such major energy infrastructure projects should not face interference or objections. The GSI is designated as a Project of Common Interest by the European Union. Furthermore, the Cypriot government is expected to release €25 million in funding for the project operator, ADMIE, now that the necessary permitting conditions have been met.