In what is believed to be a world first, Sustainable Marine Energy (SME) has successfully installed four subsea rock anchors in the challenging tidal flows of the Falls of Warness, allowing for deployment of its PLAT-O 1 Tidal Energy Platform at the European Marine Energy Centre (EMEC). 

The four anchors SME’s berth at EMEC will be used to moor the PLAT-O tidal energy platform.  The Anchoring Remotely Operated Vehicle (AROV) used for the installation has been developed in-house at SME over the past three years. Marine operations were performed from Leask Marine’s multicat C-Salvor.

The AROV first saw action in the Solent in 2014 installing helical screw piles into the clay seabed to moor PLAT-O for its initial Yarmouth trials.   Since then the company has tackled two streams of technology development; development of an expanding rock anchor that requires no grout for installation, and integrating the required technology in the AROV package to enable remote installation at 30+m of water depth in an extreme tidal environment.

The 3.5m length anchors have a nominal holding capacity of 100t dependent on the type of the rock. Building off this success SME is now working to develop a range of anchors with even greater holding capacity and suitable for a range of substrates.

“This is a very exciting time for SME” said David Stoddart-Scott, Head of Project Development. “Not only are we making great progress with the PLAT-O platform, but we are also developing subsea anchoring solutions. We will be offering these to the marine industry as a whole. Whilst we will be busy deploying anchors for our own projects, we have also had a number of enquiries from a range of companies who are looking to benefit from our innovative technology.

“We are in the early stages, but substantial cost savings over conventional gravity anchors are possible. We think this will be a tempting prospect to the marine energy and aquaculture industries. We expect to perform our first customer deployment for a wave energy developer later this year.”