SARCO

Overview

The SARCO submarine cable is a fiber-optic system that directly links France and Italy, facilitating high-speed data transmission across the Mediterranean Sea. Operational since 2006, SARCO connects the French commune of Bonifacio, located on the southern tip of Corsica, with Santa Teresa Gallura, a coastal town in northern Sardinia, Italy. This cable plays a vital role in enhancing connectivity between the two nations, supporting regional communications infrastructure and providing a reliable data pathway for both local and international traffic.

SARCO’s geographical positioning is significant, as it bridges two Mediterranean islands that are key nodes in the broader European telecommunications network. The cable not only strengthens the digital ties between France and Italy but also contributes to the resilience of data traffic in the region by offering an alternative route to mainland connections.

Route and Landings

The SARCO cable spans the Strait of Bonifacio, a narrow waterway separating Corsica from Sardinia. Its landing points are strategically located in Bonifacio, France, and Santa Teresa Gallura, Italy. Bonifacio, a historic port town on Corsica, serves as a gateway for France’s telecommunications infrastructure, while Santa Teresa Gallura provides a similar role for Sardinia, connecting the island to Italy’s mainland networks.

The Strait of Bonifacio is known for its rugged underwater terrain and strong currents, making the installation of submarine cables in this area a technical challenge. However, its short distance-approximately 12 kilometers-makes it an ideal location for a direct fiber-optic link. This route bypasses the need for longer, more complex connections through mainland Europe, ensuring lower latency and improved reliability for data transmission between the two countries.

Ownership and History

The SARCO cable is owned and operated by Free, a telecommunications provider. Free has been responsible for the maintenance and operation of this system since its launch in 2006. The cable’s establishment was part of broader efforts to enhance cross-border connectivity within Europe, particularly between France and Italy, two countries with strong economic and cultural ties.

Since becoming ready for service, SARCO has remained a critical component of the regional telecommunications landscape. Its direct connection between Corsica and Sardinia not only serves local communities but also supports international data routes by acting as a supplementary link for larger cable systems. The cable’s operational history reflects its importance in maintaining robust and reliable communications infrastructure in the Mediterranean region.

What Our Measurements Show

Our live monitoring of the SARCO cable has recorded performance metrics across 267 measured corridors. The best round-trip time (RTT) observed is 0 milliseconds, a theoretical minimum indicating the cable’s capability for near-instantaneous data transmission over its short span. The average RTT, however, is 97 milliseconds, reflecting typical operational conditions and the impact of network equipment and routing.

The measurements highlight SARCO’s efficiency as a low-latency connection, particularly important for time-sensitive applications such as financial transactions and real-time communications. Despite its relatively short length, the cable’s performance underscores its role in ensuring stable and high-quality data transfer between France and Italy. These metrics confirm SARCO's value as a reliable asset in the regional and international telecommunications network.