In autumn 2006 Nevesbu designed and engineered the structural integration for an internal turret mooring for Bluewater Energy Services. This ship was designed for the Norwegian Continental Shelf. Due to a large number of risers, heavy seas and the ship's special design, this will be an exceptionally large turret with a bearing diameter of about 20 metres.
The bearings for an internal turret mooring are fitted in a cylindrical turret casing in the ship. The bearings enable the ship to move around the turret. This system is particularly suited to areas with extreme weather conditions. Also, because a large number of product streams can result in a complicated turntable, it is advisable to have this in-board for better accessibility.
Nevesbu designed and engineered the cylindrical structure extending from the keel of the vessel to the deck and the integration into the ship structure.