Guadeloupe Cable des Iles du Sud (GCIS)

Overview

The Guadeloupe Cable des Iles du Sud (GCIS) is a submarine cable system serving the archipelago of Guadeloupe, a French overseas region located in the Caribbean. With a total length of 118 kilometers, the GCIS is a domestic cable designed to connect several islands and coastal communities within Guadeloupe. Unlike international or intercontinental systems, the GCIS is a short-haul infrastructure project that focuses exclusively on intra-territorial connectivity. The cable became operational in 2020 and is integral to improving communication and data transfer across the dispersed islands of the archipelago.

Guadeloupe, consisting of several islands including Basse-Terre, Grande-Terre, Les Saintes, and Marie-Galante, relies on robust telecommunications infrastructure to bridge geographic separations. The GCIS plays a critical role in ensuring reliable and efficient digital connectivity for residents, businesses, and public services within the region. Its design and implementation reflect the specific needs of an island territory where undersea cables are essential for linking communities divided by stretches of open water.

Route and Landings

The GCIS connects five landing points within Guadeloupe: Beausejour, Capesterre-Belle-Eau, Saint-François, Saint-Louis, and Terre-de-Haut. These locations span multiple islands, including the main islands of Basse-Terre and Grande-Terre, as well as smaller islands like Les Saintes. Terre-de-Haut, part of the Les Saintes group, represents one of the more remote locations linked by the cable. By integrating these diverse points, the GCIS establishes a cohesive communication network across the archipelago.

The route of the GCIS traverses the Caribbean Sea, navigating the shallow waters and channels that separate Guadeloupe’s islands. Its design reflects the geographic realities of an archipelago where maritime connectivity is essential for economic, social, and administrative cohesion. Each landing point serves a specific community, ensuring that even smaller and more isolated populations, such as those on Terre-de-Haut, benefit from improved digital infrastructure. This localized approach distinguishes the GCIS from larger regional systems that primarily focus on international connectivity.

Ownership and History

The GCIS is owned by the Regional Council of Guadeloupe, the elected territorial authority responsible for overseeing regional development and infrastructure. The cable’s public ownership underscores its role as a strategic investment in the archipelago’s development rather than a commercial enterprise. By prioritizing public service over profit, the Regional Council has ensured that the GCIS addresses the unique connectivity needs of Guadeloupe’s dispersed communities.

Commissioned in 2020, the GCIS is the newest submarine cable to land in Guadeloupe. Its deployment marked a significant milestone in the region’s telecommunications landscape, complementing existing international systems while filling a critical gap in domestic connectivity. Unlike the longer international cables that serve Guadeloupe, such as the Southern Caribbean Fiber and the Eastern Caribbean Fiber System, the GCIS is a purpose-built domestic network designed to enhance local communication and data transfer capabilities.

What Our Measurements Show

Our live monitoring of the GCIS reveals consistent performance across its 12 measured corridors. The best round-trip time (RTT) recorded is 152 milliseconds, while the average RTT is 209 milliseconds. These metrics indicate reliable latency levels for a domestic cable system of this scale. The relatively short length of the GCIS, combined with its modern design, contributes to its stable performance.

These measurements highlight the GCIS’s ability to provide dependable connectivity between its five landing points. The cable’s performance is crucial for supporting the digital needs of Guadeloupe’s residents and institutions, particularly in remote areas like Terre-de-Haut. By maintaining low latency and consistent data transfer rates, the GCIS ensures that even the most isolated communities within the archipelago are not left behind in the digital era.