Samoa-American Samoa (SAS)

Samoa-American Samoa (SAS): A regional submarine cable linking two Pacific islands

The Samoa-American Samoa (SAS) submarine cable is a 250-kilometer fiber-optic link connecting Apia in Samoa to Pago Pago in American Samoa. Commissioned in 2009, this cable is jointly owned by the American Samoa Government and Elandia. It serves as a critical infrastructure component for regional connectivity, enabling telecommunications and internet services between the two territories. What stands out about SAS is the scarcity of publicly disclosed technical details. While its route and ownership are clear, specifics such as design capacity, fiber pair count, supplier, and technology remain undocumented in public sources. This lack of transparency makes it challenging to assess its exact role within the broader Pacific connectivity landscape.

Quick facts

Cable name	Samoa-American Samoa (SAS)
Length	250 km
Ready for service (RFS)	2009 (GeoCables database)
Owners	American Samoa Government, Elandia
Status	In service
Design capacity	Not disclosed
Fiber pairs	Not disclosed
Supplier	Not disclosed
Technology	Not disclosed
Landing points	Apia (Samoa); Pago Pago (American Samoa)
Other cables at Apia	Manatua, Tui-Samoa
Other cables at Pago Pago	Hawaiki, Le Vasa

🗺 Show Samoa-American Samoa (SAS) on the interactive cable map

Route

The SAS cable connects Apia, the capital of Samoa, to Pago Pago, the capital of American Samoa. This short regional route spans 250 kilometers across the South Pacific Ocean. Apia is a hub for multiple submarine cables, including Manatua and Tui-Samoa, while Pago Pago is similarly connected to Hawaiki and Le Vasa. These additional cables provide redundancy and alternative paths for international connectivity.

Why it was built and what it carries

The SAS cable was built to improve telecommunications and internet connectivity between Samoa and American Samoa. Prior to its deployment, communication between the two territories relied on satellite links, which are typically slower and more expensive than fiber-optic cables. The SAS cable likely carries a mix of internet traffic, voice communications, and data services, although specific details about its traffic composition are not disclosed.

History: what can be established

According to the GeoCables database, the SAS cable was ready for service in 2009. No conflicting dates have been identified in industry sources, making this timeline reliable. The cable’s ownership by the American Samoa Government and Elandia suggests a public-private partnership aimed at enhancing regional connectivity. However, further historical details, such as the procurement process or construction milestones, are not publicly available.

Capacity and technology

The design capacity, fiber pair count, supplier, and technology of the SAS cable are not disclosed in public sources. Without operator documentation, attributing specific values would be speculative. Given its regional scope and relatively short length, the cable may have a modest capacity compared to transoceanic systems, but this cannot be confirmed without additional information.

Latency: the physics

The theoretical one-way light propagation latency over the 250-kilometer SAS cable is approximately 1.2 milliseconds, with a round-trip time (RTT) floor of 2.5 milliseconds. However, real-world latency is higher due to factors such as land tails, terminal equipment, and network routing. GeoCables’ live measurements of the full internet path between Apia and Pago Pago show a minimum RTT of 57.8 milliseconds and an average of 58.0 milliseconds across 159 checks. This discrepancy highlights the impact of terrestrial infrastructure and routing inefficiencies on end-to-end latency.

Redundancy: what happens if it breaks

If the SAS cable were to experience a fault, alternative connectivity options exist at both landing points. Apia is connected to the Manatua and Tui-Samoa cables, while Pago Pago has access to the Hawaiki and Le Vasa cables. These systems provide redundancy and ensure that the territories can maintain international connectivity during outages. Repairing a submarine cable typically involves deploying specialized vessels to locate and fix the fault, a process that can take days to weeks depending on the severity of the issue and the availability of repair ships.

Bottom line

• The Samoa-American Samoa (SAS) cable is a 250-kilometer regional link connecting Apia and Pago Pago.
• It was commissioned in 2009 and is jointly owned by the American Samoa Government and Elandia.
• Technical details such as design capacity, fiber pairs, supplier, and technology are not publicly disclosed.
• Measured latency between Apia and Pago Pago is significantly higher than the theoretical RTT floor, reflecting terrestrial and routing factors.
• Redundancy is provided by other cables landing at Apia and Pago Pago, including Manatua, Tui-Samoa, Hawaiki, and Le Vasa.