Katthammarsvik, Sweden

Katthammarsvik: Submarine Cable Landing Point

Katthammarsvik is a harbour settlement located in Östergarn socken on the island of Gotland, Sweden. Situated in the Baltic Sea, Gotland's position makes it a natural waypoint for submarine cable routes connecting Scandinavia with the eastern Baltic region. One submarine cable lands at Katthammarsvik, linking Sweden directly to Lithuania and establishing a bilateral corridor across the Baltic Sea.

The single cable serving Katthammarsvik is the BCS East-West Interlink, which connects this Gotland settlement to Lithuania. This route represents a cross-Baltic connection, enabling direct submarine cable communication between Sweden and the Lithuanian coast. As a landing point on an island rather than the Swedish mainland, Katthammarsvik plays a distinct role in Sweden's overall submarine cable geography.

Cables Landing at Katthammarsvik

The BCS East-West Interlink is the sole submarine cable landing at Katthammarsvik. Spanning 218 kilometres, the cable reached ready-for-service status in 1997 and carries a draft status designation. In addition to its landing at Katthammarsvik, the cable connects to Lithuania, forming a direct undersea link between the Swedish island of Gotland and the eastern shore of the Baltic Sea. The BCS East-West Interlink is one of the earlier submarine cable systems to have landed in Sweden, given that the country's first submarine cable came into service in 1994.

Regional Context

Within Sweden's submarine cable infrastructure, which spans 28 landing points hosting a total of 28 cables, Katthammarsvik serves as a single-cable landing point. Several other Swedish landing points host larger concentrations of cables: Farosund, Stockholm, and Visby each accommodate three cables, while Capri Strand, Helsingborg, and Klagshamn each host two. With one cable, Katthammarsvik ranks within the top 76 percent of Sweden's 29 landing points by cable count, reflecting its more modest but still active role in the national submarine cable landscape.

Network Role

Katthammarsvik functions as a single-cable terminus rather than a multi-cable hub. Through the BCS East-West Interlink, it enables a direct submarine connection between the island of Gotland and Lithuania, contributing to east-west Baltic Sea connectivity. The cable's 218-kilometre length is notably shorter than Sweden's average submarine cable length of 304 kilometres, reflecting the relatively contained geography of the Baltic crossing it serves.

Within the regional submarine cable graph, Katthammarsvik's significance lies in its island location on Gotland, which positions it as a distinct node separate from mainland Swedish landing points. This makes it a dedicated Baltic corridor endpoint that complements the broader Swedish submarine cable network without duplicating the routes served by mainland landing points.