Installation of an AC power and optical cables system

Scope of work

Pre-trenching – 20Te with Chain Cutter


Crete / Peloponnese

Main Spread

Scanmachine 20Te


Chain Cutter EK60

Water Depth



12 days



Planning Phase

Once the substation jacket was installed, a rock dumping vessel performed the scour protection around the jacket, but there was still a need for rock installation inside the jacket.

  • Strong current & Low visibility
  • Precise placement of rock dump, especially around the spudcans
  • Limiting access inside the jacket – how to get inside with the equipment
  • Minimize disturbance to the pre-installed filter layer
  • How to maximize efficiency in execution of SOW


  • The operation required solutions for monitoring of the operation as well as the ability of working stable independently of the tidal current.
  • The ScanCrawler had been utilized within structures in the past and was selected for placing the rock, whilst the 15Te Scanmachine was selected for feeding the Scancrawler with gravel pre-dumped outside the jacket.

Other Projects

Optimize positioning of a drilling rig

Optimize positioning of a drilling rig

Rockdump redemial to support the footprint of a drilling rig on two locations, according to design criteria’s from DNV to fulfill stabilisation in the foundation and minimise seabed disturbance. Debris removal & pipe uncovering

Seabed preparation at Heimdal

Seabed preparation at Heimdal

As preparation towards an upcoming by-pass operation, Scanmudring was contracted to make 4 pits under existing pipelines to create access for client’s PRS (CRU) and Force.