Submarine cable (power/fibre-optic)
Seløy Undervannsservice perform power and fible-optic underwater cable services. After 30 years in the business we have gained solid knowledge and experience within maritime services. We specialize in engineering, installation, laying and protection of submarine cables and pipes, as well as ROV survey, diving, transportation, securing and turnkey contracts.
Submarine cable engineering and planning for fibre-optic and power cable
Our project managers have comprehensive experience in engineering and have carried out both large and smaller projects. You can count on our expertise in submarine cables, and precise planning ensures that everything is completed as agreed upon, and at a low cost.
The Remotely Operated underwater Vehicle ROV V8 Sii (https://seloy.no/en/equipment/rov-v8-sii-2) utilizes top of the art technology for inspection, observation, search, survey and small, light works. V8 Sii has a working depth of 500 meters. In connection to submarine cable work, we perform the following services:
- ROV survey of seabed for mapping new routes.
- ROV survey of existing cables.
Operator and crew can follow the mission status in real-time, and the unique configuration allows for precise maneuvering.
Supply of submarine cable
Seløy Undervannsservice supplies power and fibre-optic cable.
Transport of cable, on or off cable reel
We have barges (e.g. Nautilus Maxi) for safe transport of submarine cable.
Laying of submarine cable on seabed
Submarine cables are laid down by using specially constructed vessels. The vessels carry the submarine cable on board and slowly lay it out on the seabed with a carefully controlled speed. This ensures minimal strain on the cable.
The route is surveyed and mapped in advance to protect the cable from rocky and irregular terrain. After laying we conduct a control with diver or ROV to make sure the cable lies safely and in place.
Securing submarine cable in landfall and shoreline
Submarine cables and pipes should be secured at landing/shoreline. We often recommend digging down the cable at landing so that the cable is protected from outside surroundings like waves and ice.
Cathodic protection of submarine cable
Cathodic protection is a method for corrosion protection of metals. Corrosion is the general name of the phenomenon of oxidation of metals, and often occurs on metal when it comes in contact with water. Rust and irrigation are examples of corrosion. We perform cathodic protection of the submarine cable so our customers can avoid spending large sums of money on regular inspections and corrosion improvements.
Installation of signs on land and under water
We install warning and information signs for protection of subsea cables. The signs ensure safe traffic and prohibits anchoring in the area.
Turnkey submarine cable project
Seløy Undervannsservice perform turkey projects in submarine power cable and fibre-optic cable services. We are a maritime entrepreneur who manage the project from start to finish. Our project managers, captains, divers and other talented crew carry out projects safely and cost efficiently with top of the art equipment and vessels.