Sao Tome: A Gateway to Connectivity in Sao Tome and Principe
Sao Tome, the capital city of Sao Tome and Principe, is home to the country’s sole submarine cable landing point. Despite its small size and remote location in the Gulf of Guinea, this landing point plays an important role in connecting the island nation to the rest of the world. With two submarine cables landing here, Sao Tome is a critical node for both international and regional communication.
Two Cables, Two Stories
The
Africa Coast to Europe (ACE) cable, which spans an impressive 17,000 kilometers, has been operational since 2012. This cable connects Sao Tome to a vast network of 17 other landing points across Africa and Europe, including major hubs like Lagos, Dakar, and Carcavelos. ACE provides Sao Tome with direct access to international connectivity, linking the island to global internet infrastructure and facilitating communication with countries as far away as France.
The second cable,
Ultramar GE, is much shorter at 263 kilometers and entered service in 2023. This cable connects Sao Tome to
Annobon, a small island belonging to Equatorial Guinea. Ultramar GE serves as a regional link, ensuring reliable connectivity between neighboring islands in the Gulf of Guinea.
Together, these cables form a dual-layered system: ACE connects Sao Tome to the broader international network, while Ultramar GE strengthens regional ties.
Latency: A Measured Connection
GeoCables’ monitoring data reveals that Sao Tome achieves an average round-trip latency of 70 milliseconds, with the best observed latency being 60 milliseconds. These figures reflect the efficiency of the submarine cable infrastructure here, ensuring that data flows smoothly between Sao Tome and its connected destinations. For an island nation, such latency numbers are a testament to the reliability of its connectivity.
Why Connectivity Matters in Sao Tome
As a small island nation, Sao Tome and Principe relies heavily on its submarine cables for communication, trade, and development. The ACE cable is particularly significant, as it provides a direct link to major economic and technological hubs across Africa and Europe. This connectivity supports everything from local businesses uploading data to international markets, to residents accessing global information and services.
The addition of Ultramar GE strengthens regional collaboration, particularly with Equatorial Guinea. This cable ensures that Sao Tome remains well-connected to its neighbors, fostering economic and cultural exchanges within the Gulf of Guinea.
A Strategic Landing Point
Sao Tome’s position as the sole landing point for submarine cables in Sao Tome and Principe highlights its importance in the country’s digital landscape. Whether connecting to distant continents via ACE or fostering regional ties through Ultramar GE, this landing point ensures that the island nation remains plugged into the global network. For a country with limited infrastructure, these cables are indispensable in bridging the geographical isolation of this tropical archipelago.