Carnegie CETO6 Cable Engineering Study

Atteris performed the following:

• A preliminary route investigation and layout for the offshore export cable from the onshore plant out to the proposed CETO deployment site west of Five Fathom Bank. Determination of the route took into consideration key risk areas, such as anchorages and existing installed infrastructure, potential for abrasion and minimise the need for additional stabilisation.
• A sensitivity analysis to determine whether deployment of CETO units in 30 to 35m water depths, which increases the distance offshore from 8 to 16km, makes a material difference to the cable route.
• Assessment of key risks to cable integrity and investigation on options for cable protection and stability was also conducted. The assessment identified areas of the route that traversed rocky terrain and cable protection systems such as Protectorshell was identified for these areas for cable protection and improved stability.
• Atteris also outlined a proposed construction method, including proposed installation techniques, equipment / vessel requirements, relevant standards, and suggested contractors.
• Identification of knowledge gaps with a focus on geotechnical and geophysical data requirements to assist with subsequent feasibility and detailed design stages.