Varna, Bulgaria

Varna, Bulgaria: Submarine Cable Landing Point

Varna is the largest city on the Bulgarian Black Sea Coast, situated in the Gulf of Varna in northeastern Bulgaria. As a major Black Sea seaport with a long history as a maritime hub, Varna serves as Bulgaria's connection point to the regional submarine cable network. One submarine cable lands at Varna, linking Bulgaria to neighboring Black Sea nations within a defined regional corridor.

The cable landing at Varna is part of the Black Sea regional network, connecting Bulgaria with Romania to the north and Turkey to the south. This positions Varna as a node within a corridor that runs along the western and southwestern Black Sea coastline, enabling connectivity between three distinct national networks across this enclosed inland sea.

Cables Landing at Varna

KAFOS is the submarine cable landing at Varna. Spanning 538 kilometres, KAFOS received its ready-for-service status in 1997 and remains listed in draft status. In addition to its landing at Varna, Bulgaria, KAFOS connects to Romania and Turkey, forming a three-country arc along the Black Sea. The cable links the Bulgarian, Romanian, and Turkish coastal networks across the western and southern portions of the Black Sea basin.

Regional Context

Within Bulgaria, Varna is one of three submarine cable landing points alongside Aheloy and Balchik, each of which also hosts a single cable. Varna is distinguished from its Bulgarian peers by its position on the KAFOS cable, which connects three countries rather than a smaller subset of regional partners. All three Bulgarian landing points are situated on the Black Sea coast, reflecting the country's orientation toward that sea for its submarine cable infrastructure.

Network Role

Varna functions as a single-cable terminus within the international submarine cable network, with KAFOS providing the sole subsea link departing from this landing point. Through KAFOS, Varna participates in a three-country Black Sea corridor connecting Bulgaria, Romania, and Turkey — three nations whose coastlines together define much of the western and southern Black Sea perimeter. The cable's 1997 ready-for-service date places it among the earlier generation of Black Sea regional submarine systems.

As a single-cable landing point, Varna does not operate as a multi-cable hub in the way that some larger national gateway cities do. Nevertheless, its presence in the Bulgarian submarine cable map, alongside Aheloy and Balchik, reflects a distributed approach to national landing infrastructure along the Black Sea coast. Within the regional submarine cable graph, Varna represents Bulgaria's direct subsea connection to both its northern neighbor Romania and its southern neighbor Turkey via a single shared cable system.