how to measure marine anchor chain
how to measure marine anchor chain

The anchor chain is an essential part of any boat, and it’s important to keep it in good condition. However, it can be difficult to determine the condition of the anchor chain without the proper tools. In this article, we will introduce you to a simple but effective way to measure marine anchor chains.

What is a Marine Anchor Chain?

Marine anchor chains are critical components of a ship’s anchor system. The anchor chain consists of a series of links, each with a heavy end and a small end. When the large heavy end is dragged across the seabed, it ties into the small end, which prevents the ship from moving. Marine anchor chains come in different sizes and types to best suit different applications.

Calculate Length:
To calculate the length of the marine anchor chain you will need, first measure out the circumference of your buoy using a piece of string or a ruler. Next, multiply that number by 3.14 to get inches. This number will be your chain’s nominal diameter (ND).

Determine Type:
Next, you will need to determine the type of marine anchor chain you have. There are three types; rode, wire, and hydraulic systems.

Rode systems use individual links that ride on an axle at one end and are held in place by springs at the other end. They are easy to move but can become tangled if not properly maintained.

Wired systems use coiled wire at one end and either spring or weights at the other, similar to how electrical cords work on your home TV set. These systems are more reliable but can be more difficult to untangle in emergency situations.

Hydraulic systems work like air brake hoses – when pressure is applied to one side they expand quickly on both sides and grip whatever they touch tightly, even in seawater. They are the most reliable but also the most expensive.

How to Measure Marine Anchor Chain Use?

Marine Anchor Chain is the main line used to secure a vessel to the seabed. It should be a strong and reliable line capable of withstanding a great deal of strain. The chain is typically measured in nautical miles (nm) or kilometers (km). A standard measure for a marine anchor chain is 1/8 nm.

To measure the marine anchor chain, first, find out how long the chain will be needed. It is helpful to have a basic understanding of chain size and weight so that you can determine the length required. Next, find a tall object on shore or at your anchorage that you can use as a reference point for measuring distance. Take accurate measurements from the reference point to each end of the desired chain length. For example, if you need a 3/8 nm chain, take measurements of 2 nm at one end and 1 nm at the other end. Finally, multiply these lengths together to get the total chain length required.

What to do if the Marine Anchor Chain is Too Short?

If your marine anchor chain is shorter than the recommended minimum length, you can either shorten it yourself or get a new one. If the chain is too short and cannot be shortened, you will need to replace it.
The minimum recommended length for a marine anchor chain is 8 feet long. If the chain is shorter than this, it will not be able to hold the weight of the boat in heavy seas.
When replacing a marine anchor chain, make sure that you buy one that is of equal or greater strength than the old chain. When measuring your anchor chain, make sure to take into account both the link and shackle lengths.

What to do if the Marine Anchor Chain is Too Long?

If the marine anchor chain is too long, you can cut it to the desired length. You will also need to make sure that the knots in the chain are tight, otherwise, the chain may become loose and could cause problems while anchoring.

What are the Different Types of Marine Anchor Chains?

There are a few different types of marine anchor chains that you may encounter when out at sea. In this article, we will discuss the different types and how to properly measure them.

The first type of anchor chain is the bowline anchor chain. This consists of two short pieces of chain that are fastened around the bow of the boat. When pulled tight, it creates a stronghold in the ground.

Another type of anchor chain is the stern line anchor chain. This is similar to the bowline anchor chain but has a longer piece connecting the bow and stern of the boat. When pulled tight, it also creates a stronghold in the ground.

The third type of anchor chain is called a rodeo or dragline anchor chain. This consists of one long piece of chain that can be dragged through the water to create a hold in whatever spot you desire. It’s especially helpful if you need to stop quickly in shallow waters or if there’s not enough room for your propeller to fit in between other objects on shore.

In order to properly measure marine anchor chains, you will need to know their length and width measurements as well as their weight. To do this, use an accurate ruler and measurement tape (or scale). Be sure to take into account any slackness in the chains so that they don’t pull too tightly when being tightened down onto your vessel’s anchors!

How to Choose the Rightmarine Anchor Chain for Your Application?

When choosing a marine anchor chain, the size and weight of the vessel, as well as the type of anchor to be used, must be taken into account. The chain should also be chosen according to the type of seabed being anchored onto.

Generally speaking, there are three types of marine anchors: weight-carrying anchors such as spars or chains; clinching (or holding) anchors which use weight and a spring-loaded claw to grip the seabed; and drifting or kedge anchors which are attached by a long cable to a buoy or other floating object.

Each type of anchor has its own advantages and disadvantages when it comes to using on different types of seabed. For example, a weight-carrying anchor is more suitable for dragging an anchor from one spot to another than for setting it in place permanently, whereas clinching anchors are better for anchoring in soft mud and rocks.

Rightmarine Anchor Chain

The size and weight of your vessel will affect the type of anchor you need, as will the nature of the seabed. A good rule of thumb is to choose the smallest anchor possible that can still hold your vessel in place.

When measuring a marine anchor chain, always make sure to measure from the bow end (the end closest to the water) down toward the heel end (the end farthest from the water). This way you ensure that you get an accurate reading as there may be some stretch inherent in most chain links.

When choosing a marine anchor chain, it is also important to take into account the qualities of the rope itself. Chain made from synthetic materials is usually more durable than those made from natural materials, but both types are susceptible to stretching and kinking. If your anchor chain is going to be used in harsh conditions, it is advisable to choose a chain with a weatherproof coating.

Finally, it is important to make sure that the marine anchor chain you choose is suitable for the type of seabed you plan to anchor onto. For example, if you are anchoring onto a rocky seabed, you will need a heavier chain than if you are anchoring onto sand or mud.


If you’re in the market for a new marine anchor chain, it can be difficult to know just how much to buy. Thankfully, we’ve provided this guide on how to measure marine anchor chains so that you can buy the correct amount and avoid any potential problems down the line. Make sure to read through this guide before making your purchase so that you don’t end up with a faulty or too-small anchor chain!