Thetis

Overview

Thetis is a domestic submarine cable system operating entirely within Greece. Spanning 660 kilometres, it connects a wide range of Greek island and mainland communities across the Aegean and Ionian seas. Owned by Vodafone, Thetis serves as an intra-Greek connectivity infrastructure, linking twenty landing points across the country's coastal and island geography.

Route and Landings

All landing points on the Thetis system are located in Greece. The cable reaches an extensive set of locations including Aethos, Agios Sostis, Baxedes, Ermoupoli, Filizi, Kalafati, Kardamena, Kavos, Kochilari, Kontokali, Kremasti, Mykonos, Naousa, Naxos, Perivolos, Pirgaki, Plataria, Plimmiri, Sitia, and Tinos. This breadth of landings spans multiple island groups, including points associated with the Cyclades, the Dodecanese, and locations along the Greek mainland coast.

Ownership and Operators

Thetis is solely owned by Vodafone. Vodafone is a multinational telecommunications company with a substantial presence in the Greek market, operating mobile and fixed-line services across the country. As the single owner, Vodafone both funds and operates the cable system to support its network footprint across the Greek islands and coastline.

Status and Timeline

Thetis entered service in 2022, making it a relatively recent addition to Greece's submarine cable infrastructure.

Regional Context

Greece is served by several international submarine cable systems of considerably greater length, including the trans-continental 2Africa system at 45,000 kilometres and Asia Africa Europe-1 (AAE-1) at 25,000 kilometres, both of which connect Greece to distant regions. Regional systems such as Blue, Medusa, and MedNautilus also land in Greece, linking it to neighbouring Mediterranean countries. Thetis occupies a distinct position among these peers: at 660 kilometres and with all twenty landing points located within Greece, it is focused entirely on domestic connectivity rather than international or cross-Mediterranean reach.

Strategic Role

By connecting twenty points distributed across Greek island groups and mainland coastal sites, Thetis extends submarine cable connectivity to communities that might otherwise rely on longer or less direct routing. Its concentration of landings across the Aegean and Ionian regions reflects the geographic challenges of serving a highly fragmented archipelago, where terrestrial infrastructure is limited and submarine cables represent a practical means of delivering network connectivity at scale.