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Catenary Mooring System

 

Taut leg Mooring System

 

 
 
 
 

Definition of Anchor

An anchor is a heavy object, often made out of metal, that is used to attach ships to the bottom at a specific point. There are two primary classes of anchors—temporary and permanent. A permanent anchor is often called a mooring, and is rarely moved; it is quite possible the vessel cannot hoist it aboard but must hire a service to move or maintain it. An alternative to using an anchor under these circumstances may be to use a pile driven into the seabed. A temporary anchor is usually carried by the vessel, and hoisted aboard whenever the vessel is under way.

Mooring System

The most common mooring line configuration in water depths of up to 1000 m is the catenary mooring line consisting of chain and wire rope.

For exploration and production in water depths beyond 1000m, the weight of the mooring line starts to become a limiting factor in the design of the floater,then the use of synthetic ropes in the mooring line (lessweight) and/or a taut leg mooring system.