A transfer vessel for assisting offloading and transfer of fluid from an offshore production facility to a fluid carrying vessel in open sea, comprising - a transfer vessel hull (20,13) having a first and a second outer longitudinal hull side; - a transfer vessel deck; - propulsion means (12,12a) for actively maintaining the transfer vessel at a predetermined safety distance from the offshore production facility and the fluid carrying vessel during fluid transfer operations; and - fluid transfer means (5,107) for transferring fluid between the offshore structure and the fluid carrying vessel at said predetermined safety distance, wherein said fluid transfer means (5,107) comprises a loading arrangement for receiving fluid from the offshore production facility comprising a loading manifold configured to be connected to an end of at least one production facility loading hose, a discharge arrangement (5,6) for discharging fluid to the fluid carrying vessel comprising at least one vessel discharge hose and a fluid coupling system situated in the transfer vessel forming a fluid communicating coupling between the loading arrangement and the discharge arrangement (5,6), characterized in that the hull further comprises - a main hull member and - at least one protruding hull member arranged below the transfer vessels water line at each of the outer longitudinal hull sides (20a,20b) for suppressing roll of the vessel, wherein the at least one protruding hull member extends at least partly along the hulls longitudinal length and wherein said fluid transfer means (5, 107) comprise a side loading arrangement for receiving fluid from the offshore production facility comprising at least one loading manifold positioned at the side of the transfer vessel. - a transfer vessel hull (20,13) having a first and a second outer longitudinal hull side; - a transfer vessel deck; - propulsion means (12,12a) for actively maintaining the transfer vessel at a predetermined safety distance from the offshore production facility and the fluid carrying vessel during fluid transfer operations; and - fluid transfer means (5,107) for transferring fluid between the offshore structure and the fluid carrying vessel at said predetermined safety distance, a loading arrangement for receiving fluid from the offshore production facility comprising a loading manifold configured to be connected to an end of at least one production facility loading hose, a discharge arrangement (5,6) for discharging fluid to the fluid carrying vessel comprising at least one vessel discharge hose and a fluid coupling system situated in the transfer vessel forming a fluid communicating coupling between the loading arrangement and the discharge arrangement (5,6), - a main hull member and - at least one protruding hull member arranged below the transfer vessels water line at each of the outer longitudinal hull sides (20a,20b) for suppressing roll of the vessel, wherein the at least one protruding hull member extends at least partly along the hulls longitudinal length and wherein said fluid transfer means (5, 107) comprise a side loading arrangement for receiving fluid from the offshore production facility comprising at least one loading manifold positioned at the side of the transfer vessel. wherein the at least one protruding hull member extends at least partly along the hulls longitudinal length and wherein said fluid transfer means (5, 107) comprise a side loading arrangement for receiving fluid from the offshore production facility comprising at least one loading manifold positioned at the side of the transfer vessel.