A vessel (1) comprises a rotatable turret (14) and a supporting
structure
(3) over or on the turret for supporting a swivel (5). The swivel
comprising an inner and an outer ring (21, 21; 22, 22) which
can rotate with respect to each other and which define at least one fluid distribution
path from a geostationary fluid riser (19) connected to one ring (22,
22) to a product outflow pipe (18) connected to the other ring
(21, 21). A rig (2) is mounted over the turret area above
or below the swivel (5), and a substantially rigid pipe extends from the
rig, through a moonpool of the turret towards the sea bed, the rigid pipe being
in line with the swivel.