| Cable Name: | C-Lion1 |
| Map: | C-lion_cable_card.png |
| Owners: | Cinia Oy |
| Design Capacity: | 120Tbit/s |
| Current Capacity: | 144Tbit/s |
| Length: | 1173km (729miles) |
C-Lion1 is a submarine communications cable between Finland and Germany. The cable is owned and operated by the Finnish telecommunications and IT services company Cinia Oy.[1] It is the first direct communications cable between Finland and Central Europe; previous connections have been through Sweden and Denmark.
The cable was damaged in November 2024, taking the cable offline between November 18 and November 28.[2] Some officials suspect the damaging was an act of sabotage.[3]
The cable is long and has eight fiber pairs with a design capacity of 120 Tbit/s and a maximum capacity of 144 Tbit/s.[4] [5] [6]
Alcatel Submarine Networks commenced the installation of the cable in October 2015, completing the process in January 2016. The cable entered commercial operation in May 2016.
In October 2017, a network switch was installed to the Finnish port city of Hanko.[7]
See main article: article. A fault was detected in the cable on 18 November 2024,[8] after which the services provided over the cable went down. According to the Finnish operating company 'Cinia Oy', the cable service was interrupted by a subsea physical force . The fault was discovered off the coast of the Swedish island of Öland.[9]
German Federal Defense Minister Boris Pistorius called the incident an act of sabotage. As of 19 November 2024, the cause of the fault was being investigated.[10] [9]
The Lithuanian Naval Force announced increased surveillance of its waters in response to the damage and would discuss further measures with Lithuanias' allies.
On 29 November 2024, the operator Cinia Oy announced that the cable had been completely repaired.[11]
C-Lion1 has landing points in: