The exact configuration of a turret mooring system differs from application to application depending on process requirements, vessel size, environmental conditions, etc.
An external turret mooring system is similar to an internal turret mooring system, however, the turret is located outside the ship’s hull.
This may reduce the modifications required to the ship’s hull and allows for integration quayside, while the internal turret mooring system requires dry-docking of the vessel. However, it limits the number of risers and therefore, the number of fluid paths that can be accommodated.
Another difference is that the chain table of an external turret mooring system is usually located above water level while the internal mooring system has a submerged chain table structure.
This feature allows the system to be used in shallow waters and because the effective depth of the mooring system increases, the storage capacity of the hull can be maximised.
This system is primarily for use on smaller fields in shallow water.
