What each country and landing point keeps if Longyearbyen-Ny-Ålesund goes down. A calculation from our cable and landing-point database, not a forecast.
Ny-Ålesund, Norway: no other cable lands within 50 km.
On an island this means losing the submarine link; on the mainland traffic can still go over land.
No alerts from our monitoring on this cable in the last 180 days. Events feed →
Counted: other international cables landing in the same country (domestic cables between points of one country are not a way out), other cables at landing points within 50 km, and whether the country has land links. Not counted: cable capacity, operator contracts and satellite. Use as a first look at dependence, not as a statement of what would happen.
About the Longyearbyen-Ny-Ålesund Cable System
Longyearbyen-Ny-Ålesund: Connecting Arctic Research Communities
The Longyearbyen-Ny-Ålesund submarine cable is a fiber-optic link connecting two key locations in Norway's Svalbard archipelago: Longyearbyen, the largest settlement and administrative center, and Ny-Ålesund, a research hub known for its Arctic scientific activities. Spanning approximately 540 km, this cable is listed as in service and is owned by Sikt, a Norwegian organization specializing in digital infrastructure for research and education.
What makes this cable particularly noteworthy is its role in supporting scientific research in one of the northernmost inhabited areas of the world. However, many technical details about the cable remain undisclosed, including its design capacity, fiber pair count, supplier, and specific technological specifications. This lack of public information limits a full understanding of its capabilities and operational features.
Quick facts
Cable name
Longyearbyen-Ny-Ålesund
Length
540 km
Ready for service
2015 (GeoCables database value; no conflicting dates surfaced)
The cable connects Longyearbyen and Ny-Ålesund, both located on the island of Spitsbergen in the Svalbard archipelago. Longyearbyen serves as the administrative and logistical hub of Svalbard, while Ny-Ålesund is home to multiple international research stations focused on environmental and climate studies. The route traverses the Arctic Ocean, underscoring the logistical challenges of laying and maintaining submarine cables in extreme northern environments.
Why it was built and what it carries
The Longyearbyen-Ny-Ålesund cable was built to enhance connectivity between these two remote Arctic communities, with a focus on supporting scientific research activities. Ny-Ålesund hosts research stations operated by organizations from various countries, and reliable high-speed data transmission is essential for their operations. The cable likely carries research data, internet traffic, and other communications critical to the functioning of these facilities.
History: what can be established
The GeoCables database lists the cable as having been ready for service in 2015. No conflicting dates from industry sources have been identified, suggesting this timeline is accurate. The cable's construction likely involved overcoming significant challenges related to Arctic conditions, including ice cover, extreme cold, and remote geography. However, specific details about its deployment and commissioning are not publicly available.
Capacity and technology
Publicly available records do not disclose the design capacity, fiber pair count, supplier, or specific technology used in the Longyearbyen-Ny-Ålesund cable. Without operator documentation, these aspects remain speculative. Given its role in supporting research activities, it is reasonable to assume the cable is designed to handle high-speed data transmission, but the exact specifications are unknown.
Latency: the physics
The computed latency floor for the 540 km wet segment of the cable is approximately 2.6 ms for one-way light propagation, translating to a theoretical round-trip time (RTT) of 5.3 ms. However, real-world latency will be higher due to additional factors such as land-based fiber tails, terminal equipment, and routing inefficiencies. No live measurements are currently available for this cable, so actual performance cannot be verified.
Redundancy: what happens if it breaks
If the Longyearbyen-Ny-Ålesund cable experiences a fault, redundancy may be provided by other cables landing at Longyearbyen, such as the Arctic Way and the Svalbard Undersea Cable System. These alternative systems could potentially reroute traffic, though their ability to fully compensate for a failure would depend on their capacity and configuration. Repairing a submarine cable in Arctic waters poses unique challenges, including harsh weather conditions and limited accessibility, which could prolong restoration times.
Bottom line
The Longyearbyen-Ny-Ålesund cable spans 540 km and connects two key locations in Norway's Svalbard archipelago.
Owned by Sikt, the cable has been in service since 2015, according to GeoCables records.
Many technical details, including design capacity, fiber pairs, supplier, and technology, are not publicly disclosed.
Theoretical latency for the wet segment is ≈ 5.3 ms round-trip, but real-world latency will be higher.
Redundancy may be provided by other cables landing at Longyearbyen, but Arctic repair logistics are challenging.