BCS East-West Interlink

Overview

BCS East-West Interlink is a submarine cable system spanning 218 kilometres across the Baltic Sea, connecting Šventoji on the Lithuanian coast to Katthammarsvik on the Swedish island of Gotland. Placed into service in November 1997, it is one of the earlier fibre-optic links to tie the post-Soviet Baltic states directly into northern European telecommunications infrastructure.

Route and Geography

The cable's endpoints are telling. Šventoji sits on Lithuania's narrow coastal strip, the country's only access to the Baltic, making it the natural landfall point for any westward undersea connection. Katthammarsvik, on Gotland's eastern shore, positions the system's Swedish terminus on an island that sits roughly at the geographic centre of the Baltic Sea. That mid-Baltic anchorage gives the link a degree of routing efficiency that a mainland Swedish landing would not offer. At 218 kilometres, the crossing is relatively compact by the standards of international submarine cables.

Ownership

The system is owned by Arelion, the wholesale carrier formerly known as Telia Carrier. Arelion operates one of the more extensive backbone networks in northern Europe, and BCS East-West Interlink fits within that broader pattern of Baltic connectivity assets. Build documentation for the cable is not on public record.

Regional Context

The Baltic Sea hosts a dense and growing web of submarine cables, reflecting both the region's high dependence on international data transit and the relatively shallow, navigable waters that make cable laying practicable. BCS East-West Interlink predates the most recent wave of Baltic cable investment by some years, but its direct Lithuania-to-Gotland path continues to serve a distinct routing function — one that complements rather than duplicates the other Baltic crossings in Arelion's and its neighbours' portfolios.