After a successful installation, the first seven SCOL units are now in operation. The units are located next to the Ekofisk tank and on the remains of two booster platforms in the British sector of the North Sea.

A SCOL unit is a “Self Contained Offshore Lighthouse”, and is based on battery and solar power technology with remote operating and monitoring capabilities.

These units are used during dismantling of offshore installations to mark the position of elements that are without power, and they are specially designed to withstand the harsh winter conditions of the North Sea.



This project was initiated in 2008 when Conoco Philips first contacted us with their requirement. After a number of challenges in the concept and design phase, we found a solution that would be suitable.

We proceeded to establish contact with the sub suppliers needed for the realization of this project. Bergen Group Engineering played a central role in the realization of this project, and is responsible for calculating and constructing the frame based on the sketches that we provided. Bergen Group also helped in the development of a lifting set that allows for easy replacement of the units by use of crane or helicopter.

One of the projects main challenges was the time aspect. A close relationship with both customer and sub suppliers, as well as an outstanding effort from our very skilled co-workers has contributed to making this project a success.


The units are made up of a lamp and an active radar reflector, powered by twelve solar panels, and are constructed to withstand harsh conditions over long periods.

Each unit contains a battery bank with sufficient capacity to maintain operation throughout the dark winter months in the North Sea.

The units are also equipped with a control unit and remote communication capabilities using satellite or GSM technology. This allows for the user to monitor and control the unit from any location on land and sea.

The units are mounted by first welding a circular base plate with a centered pole onto the installation that is to be marked. The unit itself is then lifted onto the base plate by crane or helicopter.

The lifting set utilizes a lifting ball that requires no handling for hooking on or off so that the unit can be quickly and easily replaced for maintenance.

The unit is omni-directional, which means that you do not need to take into account that solar panels should be pointing towards the south, which significantly simplifies installation and reduces the possibility that the device becomes stuck from corrosion.


Nav. aid light range


Operating temperature

-20°C til +40°C
Operating wind range Up to 60 m/s
Autonomous power capacity

4 years in the North Sea

Service interval 4 years
Remote communications Satellite/GSM
Delivery system By crane or helicopter
Structural design DNV approved ep002581
Radar beacon Active


In the picture: Complete SCOL unit with satellite communication.

Complete SCOL unit with satellite communication.


In the picture: SCOL units installed next to the Ekofisk tank. (Image by ConocoPhillips)

SCOL units installed on tripod by the Ekofisk tank.


In the picture: Three SCOL units installed next to Ekofisk tank. (Image by ConocoPhillips)

Three SCOL units installed on Tripod by Ekofisk tank.


In the picture: SCOL unit being installed on the remains of a booster platform. (Image by ConocoPhillips)

SCOL unit being installed on booster.

Tags: aton, aids to navigation

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