ARSAT Submarine Fiber Optic Cable: A Short-Distance Connection in Argentina
The ARSAT Submarine Fiber Optic Cable is a 40-kilometer submarine telecommunications cable linking
Cabo Espiritu Santo and
Punta Dungeness in Argentina. Owned by ARSAT, a state-owned telecommunications company, this cable is listed as in service and was recorded in the GeoCables database as being ready for service in 2012. However, public information on its design capacity, fiber pair count, supplier, and specific technology is not disclosed, leaving several technical details about the cable uncertain.
What makes this cable noteworthy is its short length and its role in connecting two landing points within Argentina. Submarine cables of this scale are relatively uncommon, as most such systems span vast distances across oceans to connect different countries or continents. Its purpose and operational role within Argentina's telecommunications infrastructure remain areas of interest, especially given the lack of publicly available details about its technical specifications and traffic capacity.
Quick facts
| Name | ARSAT Submarine Fiber Optic Cable |
| Length | 40 km |
| Ready for Service (RFS) | 2012 (GeoCables database value; other sources not surfaced) |
| Owner | ARSAT |
| Status | In service |
| Design Capacity | Not disclosed |
| Fiber Pairs | Not disclosed |
| Supplier | Not disclosed |
| Technology | Not disclosed |
| Landing Points | Cabo Espiritu Santo (Argentina), Punta Dungeness (Argentina) |
🗺 Show ARSAT Submarine Fiber Optic Cable on the interactive cable map
Route
The ARSAT Submarine Fiber Optic Cable connects two landing points in southern Argentina: Cabo Espiritu Santo and Punta Dungeness. Both locations are situated in the province of Tierra del Fuego, making this cable a domestic link. Cabo Espiritu Santo lies near the eastern tip of the island of Tierra del Fuego, while Punta Dungeness is located at the southernmost point of the mainland, near the Strait of Magellan. The cable traverses a short distance across the strait, a historically significant maritime corridor.
Why it was built and what it carries
While specific details about the cable's traffic capacity and purpose are not publicly disclosed, its short length and domestic route suggest it plays a role in regional connectivity within Argentina. It may serve to improve communications between Tierra del Fuego and the mainland, potentially supporting local internet, voice, and data services. Submarine cables of this nature often fill gaps in terrestrial networks, particularly in geographically challenging areas like the southern tip of South America.
History: what can be established
The GeoCables database records the ARSAT Submarine Fiber Optic Cable as having been ready for service in 2012. No conflicting dates have been surfaced from industry sources, although the absence of detailed public documentation makes it difficult to verify the exact timeline of construction and commissioning. ARSAT's role as the owner aligns with its broader mission to develop telecommunications infrastructure across Argentina.
Capacity and technology
Publicly available information does not disclose the design capacity, fiber pair count, supplier, or specific technology used in the ARSAT Submarine Fiber Optic Cable. Without operator documentation or reliable industry sources, these details cannot be established. It is also unclear whether the cable employs repeaters, which are typically unnecessary for short-distance cables of this length.
Latency: the physics
The computed one-way light propagation latency for the ARSAT Submarine Fiber Optic Cable is approximately 0.2 milliseconds over its 40-kilometer length. This translates to a theoretical round-trip time (RTT) floor of roughly 0.4 milliseconds for the wet segment. However, real-world latency is higher due to additional factors such as the land-based network tails, signal processing delays in terminal equipment, and routing inefficiencies. No live measurements are currently available for this cable, so actual latency figures cannot be verified.
Redundancy: what happens if it breaks
If the ARSAT Submarine Fiber Optic Cable were to experience a fault, redundancy would depend on alternative connections in the region. Public sources do not specify other submarine cables or terrestrial routes linking Cabo Espiritu Santo and Punta Dungeness, but ARSAT likely has contingency plans to reroute traffic through other parts of its network. Repairing a short-distance cable like this would typically involve deploying specialized vessels to locate and fix the fault, a process that is generally faster than repairing longer cables.
Bottom line
- The ARSAT Submarine Fiber Optic Cable is a 40-kilometer domestic link in southern Argentina.
- It connects Cabo Espiritu Santo and Punta Dungeness across the Strait of Magellan.
- Ready for service in 2012 according to GeoCables; no conflicting dates surfaced.
- Design capacity, fiber pairs, supplier, and technology are not publicly disclosed.
- Computed latency floor is 0.4 ms RTT for the wet segment; real-world latency is higher.
- Redundancy options and repair logistics are not detailed in public sources.