Monitored from 2026-03-28 through 2026-08-17 - live ICMP round-trip time measurements via our monitoring probes. All values below are recomputed daily from raw probe data. ✓ No anomalies detected in the monitored period.
Measurement sources
Probe
Location
Samples
Avg
Min-Max
Last seen
#769
control probe
108
61.8 ms
2.0-114.7
2026-08-17
About the Lanis-1 Cable System
Lanis-1: A Submarine Cable Linking the United Kingdom and Isle of Man
Lanis-1 is a submarine telecommunications cable connecting Blackpool, United Kingdom, with Port Grenaugh, Isle of Man. Spanning a modest 113 km, it is owned by Vodafone and has been listed as in service since 1992 according to GeoCables records. While its design capacity, fiber pair count, supplier, and technology specifics are not publicly disclosed, the cable plays a role in regional connectivity between the UK mainland and the Isle of Man.
What stands out about Lanis-1 is the limited public information available about its technical specifications and operational history. Additionally, there’s a potential discrepancy in its ready-for-service (RFS) year, as industry sources sometimes diverge from database records. This lack of transparency makes it challenging to fully assess its technological capabilities and role within the broader network infrastructure.
Quick facts
Name
Lanis-1
Length
113 km
Ready-for-Service (RFS) Year
1992 (GeoCables database; potential conflicts not surfaced in industry sources)
Owner
Vodafone
Status
In service
Design Capacity
Not disclosed
Fiber Pairs
Not disclosed
Supplier
Not disclosed
Technology
Not disclosed
Landing Points
Blackpool (United Kingdom), Port Grenaugh (Isle of Man)
Lanis-1 connects Blackpool, a coastal town in northwest England, to Port Grenaugh, a small settlement on the Isle of Man. This route spans the Irish Sea and provides direct connectivity between the UK mainland and the island. Blackpool serves as a hub for multiple submarine cables, including E-LLAN, Havhingsten/CeltixConnect-2 (CC-2), and Sirius South, while Port Grenaugh hosts Havhingsten/CeltixConnect-2 (CC-2) as well.
Why it was built and what it carries
The primary purpose of Lanis-1 is to facilitate telecommunications between the Isle of Man and the UK mainland. While specific details about its traffic types are not disclosed, it likely supports internet, voice, and data transmission services. The cable's relatively short length and direct route make it an efficient link for regional connectivity, though it is complemented by other cables in the corridor, such as Havhingsten/CeltixConnect-2 (CC-2).
History: what can be established
GeoCables records indicate that Lanis-1 became ready for service in 1992. There are no surfaced conflicts regarding this date in industry sources, though the absence of detailed historical documentation leaves room for uncertainty. Vodafone, the cable’s owner, is a major telecommunications provider, but public information about its specific role in Lanis-1’s deployment or upgrades is scarce.
Capacity and technology
The design capacity, fiber pair count, supplier, and technology specifications of Lanis-1 are not publicly disclosed. Without operator documentation, attributing these parameters would be speculative. Given its age, the cable likely underwent upgrades to remain compatible with modern telecommunications standards, but no public records confirm this.
Latency: the physics
The theoretical one-way light propagation latency over Lanis-1’s 113 km wet segment is approximately 0.6 ms, with a round-trip time (RTT) floor of around 1.1 ms. However, real-world latency measurements from remote probes show a minimum RTT of 2.0 ms and an average of 59.7 ms between Blackpool and Port Grenaugh. These higher values reflect the influence of land tails, terminal equipment, and internet routing, which add latency beyond the physical constraints of the cable itself.
Redundancy: what happens if it breaks
In the event of a failure, redundancy is provided by Havhingsten/CeltixConnect-2 (CC-2), which also connects Blackpool and Port Grenaugh. Repairing submarine cables typically involves locating the fault, deploying specialized vessels, and conducting underwater operations to replace or mend the damaged segment. This process can be time-consuming, but the presence of alternative routes mitigates the impact on connectivity.
Bottom line
Lanis-1 is a 113 km submarine cable connecting Blackpool, UK, to Port Grenaugh, Isle of Man.
Owned by Vodafone, it has been listed as in service since 1992 according to GeoCables records.
Design capacity, fiber pairs, supplier, and technology details are not publicly disclosed.
Theoretical RTT floor over the wet segment is 1.1 ms; real-world measurements show higher values due to additional network factors.
Redundancy is provided by Havhingsten/CeltixConnect-2 (CC-2), which shares the same corridor.