In service, SCHIEHALION will operate above the field of four main drilling centres, secured by 14 anchor legs made up of 160-mm diameter studless chain and wire rope, fixed to anchor piles arranged within a 1650-m radius. Rigid steel flowlines and flexible risers connect production and water injection wells at each centre to the FPSO. The moorings and risers are attached to a 14m diameter top-mounted internal turret inserted through the hull at the fore end. This allows “weathervane” movement around the anchored position and can accommodate up to 24 risers, as well as tensioning mooring winches, manifold and swivel arrangement.