Channel Islands-9 Liberty Submarine Cable

Overview

The Channel Islands-9 Liberty Submarine Cable is a short regional submarine cable connecting the island of Guernsey to the United Kingdom. Spanning one of the more compact corridors in European submarine cable infrastructure, it provides a direct link between the Channel Islands and the British mainland, serving the narrow sea passage between Guernsey and the Devon coast.

Route and Landings

In Guernsey, the cable lands at L'Ancresse Bay, located on the northern coast of the island. In the United Kingdom, the cable comes ashore at Stoke Fleming, a coastal village in Devon, England. No laying direction is implied between these two landing points.

Ownership and Operators

The Channel Islands-9 Liberty Submarine Cable is owned by JTGlobal. JTGlobal is the telecommunications arm of Jersey Telecom, operating services across the Channel Islands and beyond.

Status and Timeline

The cable entered service in 2008 and has been operational for approximately 18 years. It continues to serve the Guernsey–United Kingdom corridor in its current active state.

Regional Context

Guernsey is served by a total of four submarine cables landing across three landing points, reflecting the island's reliance on a small number of connections to the wider international network. The United Kingdom, by contrast, hosts 42 submarine cables across 105 landing points, encompassing long-haul systems such as 2Africa, the Europe India Gateway, Apollo, and Atlantic Crossing-1. The Channel Islands-9 Liberty Submarine Cable operates at a distinctly local scale within this corridor, rather than as a long-distance intercontinental route.

Measured latency over the last 60 days, based on 74 ping tests, records an average round-trip time of 23.6 ms, with a best recorded measurement of 20.2 ms. This figure reflects the relatively short physical distance between Guernsey and the Devon coast.

Strategic Role

The Channel Islands-9 Liberty Submarine Cable provides a direct fixed connection between Guernsey and the United Kingdom mainland. With only four cables serving Guernsey in total, each landing contributes meaningfully to the island's overall connectivity. The Stoke Fleming landing in Devon positions the cable to access UK terrestrial networks along the southwest of England, while the L'Ancresse Bay landing on Guernsey's north shore anchors it to the island's telecommunications infrastructure.