Orkney-based marine services company and Seawork exhibitor Green Marine has recently completed installation and subsequent removal operations for AWS’s Waveswing wave energy converter (WEC) at EMEC’s Scapa Flow test site.

All marine operations covering foundation transportation, installation and loadout of the 50te WEC, including towing to site and mooring / umbilical connection were performed by Green Marine’s experienced personnel aboard the Green Isle multi-cat plus GM’s support vessels.

Green Marine installed and removed AWS’s Waveswing WEC

Green Marine installed and removed AWS’s Waveswing WEC

Once on site, a stern mooring was utilised to provide enhanced station keeping whilst the rocksteady connector was deployed in the subsea locking mechanism. Once the mooring system was connected, AWS’s WEC winched itself below the sea surface to its installation depth.

Minimising operational costs and hence reliance on other contractors during all phases was a key consideration for Green Marine from the very outset when planning these operations for AWS. Using installation aids to assist the operations, Green Marine has now demonstrated it can install or recover the WEC in a single day from its multi-cat, the Green Isle, without any requirement for dive or ROV contractors.

Find out more about Green Marine’s capabilities at Seawork International 2022 on stand C49.