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roller bearing located above the vessel main deck.

The system comprises a chain-table structure anchored to the seabed anchor

points via an array of nine (9) catenary mooring lines. The chain-table structure is

attached to a turret cylinder structure which is suspended from a heavy duty roller

bearing located above the vessel’s main deck. The bearing is supported on the

vessel’s side and integrated into the forward part of the FPSO vessel’s hull. The

turret cylinder is mounted to the earth-fixed side of the main bearing. The turret

cylinder houses the riser ‘I-tubes’ and supports the manifold deck (where the risers

terminate), the manifold structure, the swivel deck together with the swivel stack

and all the earth-fixed part of the rigid piping.

Figure 6.6 – Top Mounted Internal Turret TMIT (SBM-Imodco)

The roller bearing allows the turret to freely weathervane so that the tanker

can take up the position of the least resistance to the prevailing weather, at all

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