M/T Dux and M/T Pax have provided  harbour services to the Statoil Gas Terminal at Kårstø since September 15, 1985. M/T Felix has been there since September 24, 2000.

During the period the tugs have assisted tankers both on arrival and on departure from the Gas Terminal without any LTIs. All tugs form part of the Statoil Kårstø Gas Terminal contingency plans. M/T Dux and M/T Pax are both azimut tractor tugs of 42 ton bollard pull. M/T Felix is a reverse tractor tug of 50 ton bollard pull.