What is Anchor Chain – Everything You Should Know

As seen, the anchor plays a major role in a vessel and offshore operations. However, it can only function as long as it remains attached to the floating structure.

Considering the tremendous amounts of force applied to the connection between the anchor and the ship during routine berthing or anchoring conditions , conventional methods of securing the anchor will eventually fail under the extensive stress.

The anchor chain refers to the component that attaches the anchor to the boat or structure and is usually referred to as the anchor rode (or anchor cable). It is superior to conventional methods in terms of strength and load-bearing.

The purpose of the anchor rode is to secure the anchor to a part of the vessel in such a manner that it can be easily hauled up when the need arises.

It also plays a major role in absorbing a certain portion of forces away from the main structure and anchor head. For instance, during storms or other similar weather conditions, the vessel or offshore rig tends to pitch and heel. This motion can intensify, causing damage to the vessel.

To dampen these forces, the anchor rode is designed to absorb a certain amount of the load. Since anchor chains and cables are built to withstand large forces on them, they are not drastically damaged or deformed by such loads. This absorption of forces away from the main structure and anchor is known as dampening.

Important factors to keep in mind while selecting or designing the anchor chain are the

• maximum permissible loads,
• ease of storage, and
• the expected length of the rode.

The stresses need to be checked for every unit of the rode. Metal chains have links as their primary unit component, while ropes and cables have fibres.