Subsea Cable Installation
Installation contracts are signed after bids from consortia. OrcaNet provides a comprehensive service offer:
  • project engineering, 
  • project management of bathymetric surveys,
  • route selection,
  • evaluation of resources (crews and technical teams, ship , cable length etc..),
  • completion of the installation,
  • shore ends on the coasts and connection with ground stations,
  • complete reporting.
The cable is laid on the ocean bottoms. Near the coast, it is generally buried with a plough or a crawler to protect it from anchors and trawls. Once arrived at its destination, the cable ship passes the baton to a smaller boat that pulls the cable to the beach. It will then be connected to the network via the ground station.
Each maintenance agreement covers the cables of the same zone.
These cables may be damaged by ships (anchors, fishing trawlers), but also by earthquakes, or even erosion (turbidity currents, abrasion) or power failures.
To avoid any disruption of traffic; switching equipment are used to transfer services between network paths for the duration of the repair. As the financial prejudice for carriers can rapidly reach several billion Euros, it is crucial to repair as fast as possible.
Once the fault noticed, the cable ship sails to the repair zone within 24 hours, with the relevant human and technical resources aboard. The shore stations and the technicians aboard perform measurements in order to localize the fault. The cable is then brought back on board, the damaged section is cut and replaced.