Terre-de-Haut, Guadeloupe

How the Internet Reaches Terre-de-Haut, Guadeloupe

Terre-de-Haut is a small island in the Les Saintes archipelago, part of the French overseas territory of Guadeloupe in the eastern Caribbean. Its international internet connectivity arrives indirectly — through a single submarine cable that connects it not to the wider world directly, but to other points within the Guadeloupe island group itself. Terre-de-Haut is therefore a terminus on an intra-archipelago cable rather than a node on a transoceanic route.

All submarine traffic reaching Terre-de-Haut flows through the Guadeloupe Cable des Iles du Sud (GCIS), a short inter-island cable that links several landing points across the southern part of the Guadeloupe territory. Onward international connectivity — reaching the rest of the world — depends on the broader Guadeloupe cable network accessed through those connecting points.

The Cable Serving Terre-de-Haut

The Guadeloupe Cable des Iles du Sud (GCIS) entered service in 2020 (draft status) and spans 118 km. It is an intra-territorial cable connecting Terre-de-Haut to four other landing points within Guadeloupe: Beausejour, Capesterre-Belle-Eau, Saint-François, and Saint-Louis. All five points lie within the Guadeloupe island group, meaning this cable serves as a local distribution network rather than a link to foreign countries or distant continents.

Regional Context

Guadeloupe as a whole is served by 4 submarine cables landing across 9 points, with an average cable length of 1,010 km — reflecting the territory's connections to other Caribbean islands and beyond. The first cable to serve Guadeloupe entered service in 1995. Within this network, Terre-de-Haut is one of the smaller terminuses, connected solely by the GCIS. Other landing points in Guadeloupe carry greater cable diversity: Baillif hosts 2 cables, while Baie-Mahault, Jarry, and others each host at least one additional cable that reaches beyond the territory. It is through nodes like these that Guadeloupe's external internet traffic ultimately flows.

What This Means for Connectivity

Because Terre-de-Haut is served by a single submarine cable — the GCIS — all of its submarine-delivered connectivity depends entirely on that one link. An outage on the GCIS would sever the island's direct cable connection to the rest of the Guadeloupe network. The cable's reach is limited to intra-Guadeloupe destinations: Beausejour, Capesterre-Belle-Eau, Saint-François, and Saint-Louis. Traffic bound for international destinations must transit onward through those connected points and then out via Guadeloupe's broader cable infrastructure.

Terre-de-Haut illustrates a common pattern in island internet topology: smaller, outlying islands are typically served by short inter-island distribution cables that feed into larger regional hubs, rather than by direct transoceanic connections. Understanding this layered structure helps explain why submarine cable diversity at a territory level does not always translate to redundancy at every individual island.