This change involved installation of the safer and much more efficient Ugland-Kongsberg offshore loading system (Ukols), which had been adopted a few years earlier on Statfjord A and B.
The reason the buoy remained on the field for so long without being used was to have an emergency solution available if the Ukols facility went down – something which never happened.
Statoil. Årsrapport til Statens forurensningstilsyn 2005, Statfjordfeltet, p 5.
Statoil. Fjerning og disponering av Statfjord C lastebøye (SPM C) – Forenklet konsekvensutredning. April 2012.