In this video, Statoil shows its Mariner B floating storage unit (FSU) for the Mariner field on the UK Continental Shelf (UKCS).
The Mariner field is on the East Shetland Platform of the UK North Sea, approximately 150km east of Shetland.
Mariner B will have the conventional role of receiving, storing and offloading the oil produced at the field, but also play a role in the production process as storage for diluent, which will be mixed with the heavy Mariner oil during the production process to enhance processing and increase the value of the crude. Total storage capacity is around 850,000 bbl, of which around 150,000 bbl is reserved for diluent.
The vessel can remain offshore without docking for 30 years.