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How to use Anchor Line

How to use Anchor Line

Column:FAQ    Date:2020/6/20 10:54:37    Viewed:

The anchor line is used to fix and stabilize ship, which can be demonstrated as follows:

1、Anchor hooking something at sea bottom is the basic      requirement for the anchor chain to function. If the chain cable is not      long enough, the anchor will not work. If the sea bottom is flat or the      things the anchor hooks are not fixed or the hooking is not strong enough,      there may be some risks, for example, if the sea is rough with strong  waves, the anchor cannot hook the things and it will not function, which      is call “anchor dragging”, and during anchorage, it’s dangerous for the      ship if anchor dragging happens. During anchoring operations, in general      the main engine of the ship stops to work, if the ship sets sail      immediately, it needs time and it’s dangerous for the ship to drift      forward and backward without power; therefore, there is the saying of      anchorage or anchoring zone, in other words, the sea bottom is rough and      it’s safe for anchoring.

2、The anchor chain weight can be ignored for the ship,      and the friction will not help much. Generally speaking, the anchor chain      is straight when the ship is in the process of anchoring, and the friction      effect can be ignored at this time. For some small fishing boats, they      adopt thick rope as anchor line.

3、Seen from the ship, the anchor chain is straight,      however, a length of the chain is almost parallel to the seafloor (actually      it is close to the sea bottom) under the water. The anchor provides      holding power and then transfers the power to the ship through anchor      chain to resist the influence of external load from current, wind and      waves on positioning. There is the length of the chain close to the sea      bottom because of force influence. If the anchor and the anchor line are      straight under the water, the anchor will be easy to drag because of  pulling.

The anchor chain consists of many links connecting with each other, and it’s expressed with chain diameter (mm). There are studlink and studless chains. The chain cable can be manufactured with cast, forging and welding ways. The ship chain line comprises some shackles, and the length of each shackle is in the range of 25.0 – 27.5m, the shackles are connected with links or shackles. After the anchoring, the anchor chain is stored in bow chain locker. The specification of the chain cable is calculated and determined according to ship building standards.

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