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Enhance Your Sailing Experience With the Best Mooring Lines

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Also called docking lines, mooring lines are used for mooring or securing your boat on a dock or anchor buoy for a short while. When your boat is not being used, it is crucial to have a strong mooring line that holds your boat safe and secure for as long as is necessary. No matter how glamorous your boat is, if your mooring line is substandard you risk losing or damaging your boat and everything in it—making it all the more important for you to ensure you’ve invested in only the finest of brands.

To help you out, we’ve curated a list of some of the premium mooring lines of 2024.

Our Top Picks

• Editor’s Choice: INNOCEDEAR Mooring Line Shop Now ➔
• Best Quality: Rainier Supply Co Mooring Line Shop Now ➔
• Stretch-resistant: ACY Marine Nylon Mooring Line Shop Now ➔
• Aesthetically Pleasing: Better Boat Mooring Line Shop Now ➔
• Most Protective: Chirsfly Bungee Mooring Lines Shop Now ➔
• 1 The Qualities of a Good Mooring Line
• 2 How Long Should a Mooring Line Be?
• 3 How To Choose the Right Mooring Line for Your Boat?
• 4 Rope material 

How can I tell if my mooring line needs replacement?

Which is the best material for making mooring lines, what is the right size of mooring line for my boat, how long does the average mooring line last, how can i care for my mooring line, related reviews, best mooring lines of 2024 reviewed in detail, editor’s choice.

INNOCEDEAR Mooring Line

INNOCEDEAR’s Mooring Line is sturdy enough to securely hold your ship even in extreme weather conditions. Owed to the double-braided design of the ropes that keeps them strong and intact, it also prevents the ropes from fraying. And because these nylon ropes can also easily withstand rough elements like salt and UV rays, you can rest assured it will last for years to come. 

These mooring lines are 15 feet in length and have a diameter of ½ inches. Appropriate for small to medium-sized boats that are no longer than 35 feet, this product is our favorite because it provides extraordinary strength without damaging your boat’s paint job or exterior.

• Damage-resistant fibers ensure no fraying
• The double-braided ropes are sturdy 
• Great for all weather conditions 
• Can be bulky to carry 

Best Quality

Rainier Supply Co Mooring Line

These nylon docking ropes by Rainier Supply Co are the perfect fit for keeping your boat moored and stable. It is great for boats that are up to 27 feet long, and each of these dock lines has a tensile strength of 4,000 pounds. Also capable of enduring weights up to 820 pounds, these dock lines are heat-treated to ensure no fraying and breakage. And since the ropes are made of nylon, you can rest assured that they’ll last you for years to come. 

Despite their sturdiness, the mooring lines are soft on your hands and do not scar or bruise your hands while in use. 

• The docking lines last a long time
• Naturally deters scratches
• Gentle on the hands 
• The weave is not tight enough

Stretch-resistant

ACY Marine Nylon Mooring Line

This nylon mooring line by ACY Marine is stretchy and shock-resistant, which means that you can easily apply pressure to it without fearing any breakage. The mooring line is also resistant to UV rays, which makes it immune to any damage caused by the sun’s rays. 

Also quite flexible and championed for its strength, it is safe to use and perfect for professionals and hobbyist anglers alike. The rope also has a spliced eye for effortless docking, making it a perfect option for those who struggle to secure their boat.

• It can easily withstand tension and force
• It can resist sun damage 
• It saves time
• One rope is not enough for docking 

Aesthetically Pleasing

Better Boat Mooring Line

There are really no restrictions when it comes to looking for a good mooring line. Coming to you in a pack of two, these bright blue docking ropes by Better Boat are made of marine-grade, double-braided nylon. They can easily withstand shocks and are really soft on the hands, making them comfortable to handle. 

These ropes are weather-resistant and do not get damaged due to salt water, making them quite resilient and great for use in seas and lakes. Each rope also comes with a 12 inch eyelet for easy docking. 

• Easy to handle 
• Great shock absorption
• Does not damage the exterior
• It may be a little slippery 

Most Protective

Chirsfly Bungee Mooring Lines

These sturdy bungee mooring lines by Chirsfly are made of high-quality bungee cord and measure around 4 feet in length. Their elasticity allows them to be stretched up to 5.5 feet, and to add to their functionality there is a secondary concealed rope within the bungee rope that acts as a snubber. With the two foam floats on the sides preventing chafing, the two sliding adjustments make it all the more easier to dock with ease.

The protective material and design of the rope allow it to absorb shocks and withstand large forces. This mooring line can also be used to dock boats, jet skis, rafts, cleats and many other kinds of vessels. 

• The rope is elastic 
• It is built for extra protection 
• Prevents chafing of the boat’s exterior
• It may get frayed under the pressure 

Mooring Line Buying Guide

It’s important that you choose the right docking line for your boat to ensure your safety. The following guide will help you learn more about mooring lines, as well as how to choose the right one for yourself.  

The Qualities of a Good Mooring Line

It is crucial to understand what makes a good mooring line. A quality mooring line has some degree of elasticity or elongation, and any movement caused by the wind or waves can be absorbed by the mooring line. Similarly, a good docking line will also have a high breaking force that allows it to carry and support large weight without breaking or fraying. 

How Long Should a Mooring Line Be?

The length of a mooring line is defined by the size of the boat you’re using it with. It is generally advised to keep at least four dock lines on board, with two measuring the same length as the boat and the other two measuring approximately twice the boat’s width. 

This will enable you to prepare for different kinds of ports and moorings. 

How To Choose the Right Mooring Line for Your Boat?

While there are many features to consider when buying a mooring line for your boat, some of them are more important than others. We have covered most of these features below so you can make the right decision when choosing a mooring line. 

Rope material 

The most commonly used material for mooring lines is nylon. Nylon is sturdy and can easily absorb shocks. While it can also resist abrasion better than any other material, nylon may get damaged and degrade in high temperatures. 

Polyester mooring lines are also good for docking. Aside from resisting UV rays and having great grip and elasticity, the material is also cheaper than nylon and absorbs very little water. 

The length of your mooring line is dependent on your boat’s size, which is why you must have exact measurements of your boat when you go looking for a mooring line. While you can have bow lines and stern lines that are half your boat’s length, your spring lines should at least be equal to the length of your boat. 

You may keep longer spring lines, but it is not advised to have a spring line shorter than your boat. 

Mooring lines come in different sizes that include varying diameters. The diameter of your rope indicates how well it will perform with your boat, and it is normally advised to have at least ⅛ inch diameter for every 9 feet of your boat’s length. This means that for a boat of 27 feet, your mooring line should be at least ⅜ inches in diameter.

Mooring Line for Boats FAQ

You’ll know your mooring line needs replacement if it shows signs of extensive wear and tear that can’t be repaired. 

Nylon is the sturdiest and most commonly used material for manufacturing mooring lines. This is because nylon ropes have great tensile strength and are less likely to snap when exerted force.  For those on a budget, nylon can also prove to be more budget-friendly when compared to other options. 

The size of your mooring line will be dependent on your boat. As mentioned previously, your bow and stern lines should at least be half the size of your boat. The diameter of your docking line should be ⅛ inch for every 9 feet of boat length. 

Generally speaking, the average mooring line will last as long as you take care of it. Keeping up with regular maintenance can help extend its lifespan. Investing in mooring lines that deter UV rays can also prove effective in the long run. 

It is important to use your mooring lines carefully to reduce the damage that comes with daily wear and tear . This means that you shouldn't be too abrupt when changing the direction of the line to prevent chafing. You can also use chafe guards to protect your dock line from chafing damage. 

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Best dock lines: 6 of the best options for a secure mooring

We explain what to look for in a good set of dock lines and pick out some of the best options currently available

While most of us buy our boats for the enjoyment they provide out on the water, it’s an inescapable fact that virtually every leisure craft spends far more time on its berth than it does out at sea. It follows, therefore, that its dock lines – the ropes used to secure the vessel to its berth – need to be of the correct type and size to hold the boat fast whatever the conditions when their owners are far away, back home on dry land.

Whether your boat is moored shoreside, on a swinging mooring or a running anchorage, always consider the risks when leaving the vessel unattended.

While the size of the rope required will depend on the size of the boat ( see here for a useful sizing chart ) you will not regret upsizing to a larger rope than recommended whenever a major storm rolls in. It’s also worth considering doubling up on boat ropes , again to provide additional protection against the worst of the weather.

In terms of materials, the choice is principally between nylon and polyester, both of which are strong and durable and are offered in a vast array of colors and color combinations. Owners of classic craft may opt for a synthetic hemp-lookalike rope for an authentic look.

Finally, should you go for twisted or braided lines? In our view, braided lines tend to be the more attractive of the two, as well as having a better touch and feel due to their being the more flexible. Twisted rope, however, is less expensive, can be easily spliced and is slightly more stretchy than braided line.

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Whichever type and size of rope you choose, it also goes without saying they need to be maintained in good order – so do check frequently for fraying, wear and tear.

6 of the best dock lines

Softline multifilament mooring rope

Handmade in the UK, Softline multifilament mooring ropes are available in no fewer than ten colors. There’s a great choice of diameters too – from 8 to 24 mm in 2 mm increments – and the length can be specified as anything from 4 metres upwards.

Add to that a 3″ to 20″ soft eye at one end and heat sealing, a second soft eye or a thimble at the other, and you’ve got one of the most flexible and versatile line offerings on the market today.

Key properties of Softline multifilament ropes include high strength, UV- and abrasion-resistance, and zero water absorption.

Buy it now from ropeservicesuk.com

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Wycy mooring rope bungee.

Sold in packs of two, these bright yellow and green rippled WYCY docklines comprise a built-in hidden 10 mm shock-absorbing rubber band with a woven PE outer layer.

Suitable for a variety of applications – small boats, kayaks, personal water craft and so on – these ropes facilitate quick docking by virtue of their rust proof 316 stainless steel clip at one end and a spliced loop at the other.

The length of the bungee rope is 4 feet (124cm), extending to 5.5 feet (170cm) under load, making it easy to get on and off without having to pull the boat. I own a pair of these lines and find them extremely useful and of good quality.

Buy it now from Amazon

Rainier Supply Co two pack nylon dock line

Another twin pack offer, Rainier Supply Co’s dock lines are available in two formats; 15 feet of 3/8″ rope or 25 feet of 1/2″ rope.

Made of soft, double braided black nylon, these lines are easy on the boat, comfortable to handle, strong and resistant to oil, mildew and rot.

A 12″ eye is include in the price and both ends are heat treated and wrapped to ensure the line does not unravel. If you are looking for a ready made mooring line solution, these Rainier Supply Co own-brand ropes might just be the answer.

Greenever four pack double braided nylon mooring rope

With a breaking strength of up to 6,500 lbs these 1/2″ Greenever dock lines are suitable for boats from 20 to 30 feet.

Supplied in navy blue, the each rope features a 12″ eye loop at one end, with the bitter end being heat treated and whip locked. Made of marine grade nylon, their double-braided construction is durable and fray resistant.

Abrasion-resistant and with high levels of tolerance to UV, oil, rot and mildew, these packs of four lines provide a flexible mooring solution with each 15″ line coming in at a unit price of less than £15.00.

Spliced set length LIROS braided polyester dock line

Jimmy Green Marine is a well-established and respected supplier of ropes of all kinds. This particular offer – 16 mm Liros braided dock line polyester mooring warps – is available in 10, 12 or 14 metre fixed lengths in a choice of either navy blue or black.

But if that doesn’t suit, the company will custom build ropes to your specific requirements. Each rope in our featured offer has a 300 mm soft loop splice at one end and whipping at the other, with all ropes finished in house by the Jimmy Green rigging team.

Among the features and benefits of Liros braided polyester dock lines are high elasticity, high load capacity and excellent resistance to UV and abrasion.

Buy it now from jimmygreen.com

Hempex synthetic hemp mooring line

While the purists might sniff at the use of synthetic hemp, these strong, weatherproof Hempex mooring lines certainly do a job and do it well. In short, they are hard wearing polypropylene ropes which give a traditional look while offering all the advantages of a man-made fibre.

Our featured product is supplied by Dover-based ships chandler, Sharp & Enright via their eBay store, with synthetic ropes in 12 diameters from 3 mm to 28 mm on offer.

The minimum length of these beige color lines is 5 metres, with options all the way to 75 mm listed.

Buy it now from eBay

Didn’t find what you’re looking for? Head to Amazon’s dedicated boating page for more marine products.

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The 6 Best Dock Lines (and Boat Springs) for Securing Vessels

MaOne of the most essential elements of any boat is the quality of the dock lines . They stop your prized possession from drifting away from the jetty and into the great beyond.

A good dock line will keep your vessel secure in all weathers and will last no matter what the elements have to throw at them.

So, if you're looking to upgrade your dock lines or are simply trying to make the right choice, look no further and read this article to get the lowdown on the best dock and mooring lines for boats.

How to Choose the Best Dock Line for Your Boat

Choosing the right dock line comes down to four elements: the size of your boat, the thickness of the rope, the length of the rope and the configuration you use when docking.

Once you've established these four things, you can be sure that you have chosen the best dock line for your boat.

Boat Size vs. Rope Thickness

The general rule of thumb for choosing the best size mooring line is roughly 1/8 of an inch in diameter for every 9 feet of length . For smaller craft, this is an easy decision.

There aren't any rules that state you can't have a dock line that's twice the required thickness. After all, whatever happens, it isn't going to snap.

In relation to rope thickness, here's a basic rule of length and weight to consider:

• Boats 19.5 - 33 feet - 2,200 - 20K pounds | 10 - 14 mm thick
• Boats 39.5 - 59 feet - 28 - 55K pounds | 16 - 20 mm thick
• Boats over 59 feet - 55K pounds | 24 mm thick

How Long Should My Dock Line Be?

It's generally accepted that you should keep four lines on your boat : two the same length as your boat and two lines at 2/3s the length of your boat.

For example, if you have a 26-foot vessel, you should have two 26-foot dock lines and another two at roughly 17 feet in length.

Let's Talk Dock Line Configurations and Springs

There are many ways to configure your dock lines to secure your craft and spread the load apportioned to each rope. But here I'll share the most common.

Referred to as springs, they act as a damper to a boat's forward and backward motion as it moves against waves or passing vessels. A good spring enables the load placed on the dock line to spread the weight and movement, preventing the boat from clattering violently back and forth or hitting the dock sides.

Take a look at the several springs you could deploy:

• After Quarter Spring - This is where the dock line is fed from the stern of the boat, in an outward direction away from the vessel at roughly 45 degrees.
• Quarter Breast   Spring  - These lines run at right angles to the dock cleats.
• Forward Quarter Spring  - This is where a dock line is fed from the stern and secured to a cleat located in the center of the pontoon. Again, the rope is at a 45-degree angle.
• After Bow Spring  - This is the reverse of the Forward Quarter Spring, with the dock line reaching from the bow at 45 degrees, and meeting in the center of the vessel.
• Forward Breast Spring  - This is the same as the Quarter Breast Spring but tied from the bow of the boat at a right angle.
• Forward Spring  - A rope is tied at a 45-degree angle, heading away from the boat.

Springs are important, but you wouldn't want to employ all of these at the same time. Not only would it be time-consuming, but it would also be completely pointless and considered overkill.

You should tie one at the bow and stern, and then use a Quarter Spring both fore and aft.

The Important Cleat Hitch

The cleat hitch is widely accepted as the best knot to secure your boat to a jetty or mooring where there are cleats . It's one of the easiest knots to tie, but far from simple if you want to get it right. Done properly, it would take a minor disaster for your vessel to become unhitched.

Pass the line entirely around the base of the cleat under the horns. Then, make a figure-eight over the left and right horn. To secure, turn the rope under itself to make a half hitch.

You should not require any further winding or looping as it does nothing to improve the effectiveness of the knot. In fact, should you need to cast off in an emergency, you run the risk of making it harder to unhitch with over-complicated twists. Just leave it as it is in its own simple and elegant state.

Best Rope Material

• Nylon  - This is by far the best choice for dock line as it's relatively cheap compared to other types, is elastic enough to absorb the weight and movement of your boat and is UV resistant. All in all, if you want excellent shock absorbency, choose nylon.
• Polypropylene  - This dock line is the cheapest of them all, and it shows. It does have attributes. It floats, for one thing, making it ideal should you need to retrieve it from the water. It does offer some UV resistance. However, it doesn't last as long as nylon and lacks the elasticity needed to absorb all that movement. Polypropylene is a great alternative if you're looking for the cheapest option, but it could be a false economy.

The 6 Best Dock Lines for Securing Vessels

It comes as no surprise that the best dock and mooring lines I have featured are all nylon, given its popularity and reasonable cost. It's also the material I prefer for my dock lines.

Through this list, I'll demonstrate that nylon dock lines don't have to break the bank. Although more expensive varieties are available, I have divided the ropes into budget and premium sections.

Editor's Choice

  Check Price on Amazon - Made of marine-grade double-braided nylon, Better Boat Dock Lines have a working load of 950 lbs and a b reaking strength of 4,939 lbs.

These 1/2 inch dock lines are 25 feet long and have a 12-inch heat-treated eyelet at the end. Superior shock absorption and elasticity keep boats secure in high winds and rough waters. You can even use it to hang boat fenders  or for tent tie-downs while camping.

This dock line falls nicely between a budget and premium dock line in price, so it's really a win/win as far as quality, price, strength and durability go. 

• Material: Nylon
• Thickness Range: 1/2 inch
• Length Range: 25 ft

Runner Up Dock Lines

Shoreline double-braided nylon dock line.

Check price on Amazon Shoreline dock lines are available in four colors: black, blue, gold and white. Without kinking or rotating under pressure, they have a dedicated loop on one end and a straight end on the other. This lets you decide what configuration you want to use when tying the boat to the dock.

Soft to the touch, these lines won't rub or scrape your boat. And because they're double-braided Nylon, they're super-strong with a load capacity of 1,140 pounds and a tensile breaking load of 5,700 pounds . That's enough to weather heavy conditions .

• Material : Nylon
• Thickness Range : 1/2 - 3/8 in
• Length Range : 15 - 25 ft

Crown Sporting Goods Double-Braided Dock Line

These Crown lines are available in black, blue, red and white, making them easily visible as they match your vessel's color combinations.

This rope is available in a 3/8-inch diameter and a length of 15 feet , which means it's ideal for a boat of a maximum size of 25 feet .

The double-braided Nylon construction can withstand load pressures of up 3,200 pounds and is also UV, abrasion and mildew resistant .

I like this rope, especially for docking smaller craft .

• Thickness Range : 3/8 in
• Length Range : 25 ft

Seachoice Nylon Dock Line

This Seachoice range is available in eight color combinations , ranging from vibrant red to black.

It's been designed to absorb dynamic shock loads , spreading the load's distribution through elasticity. It's mildew and mold resistant and comfortable on the hands.

This line has a working load capacity of 800 pounds with a maximum tensile load of 4,000 pounds , making it capable of securing a vessel of around 4,400 pounds.

• Thickness Range : 1/2 - 5/8 in
• Length Range : 20 - 35 ft

Amarine Made Nylon Dock Line

These Amarine lines are available in black, blue, white and a white/gold combo and have a load capacity of 968 pounds with a breaking capacity of 4,840 pounds .

This line is resistant to chemicals , acids, saltwater and UV rays, making it an ideal line for securing small to medium-size vessels .

• Thickness Range : 1/2 in

Premium Dock Lines

Seasense double-braided dock line.

This SeaSense dock line is intended for use with vessels that are at the lighter end of the spectrum (think: dinghy or small fishing boat). It has a 410-pound load capacity with a breaking strength of 3,900 pounds .

The eyelet is 10 inches in diameter. T his rope offers the elasticity that all good nylon ropes should have.

It comes in black, blue and a gold sheened white, making the springs and lines easily visible in poor conditions .

Because it's inexpensive compared to other lines, it may be the ideal choice for beginner boaters .

• Length : 15 - 25 ft

Norestar Double-Braided Dock Line

Norestar lines are extremely robust and have a high breaking strength. The 1/2-inch diameter rope has a breaking load pressure of 8,300 pounds , while the 3/4-inch thickness has a tensile load capacity of 19,100 pounds . That means it will hold a vessel of over 18,000 pounds!  

These dock lines are also abrasion-proof and UV resistant, so they should withstand the elements. 

• Length Range : 15 - 50 ft

Final Thoughts

Never underestimate the importance of a good quality dock line . It's one of the most important tools any boater can have.

Choose a cheap dock line at your peril, especially if you leave your boat docked for the winter when the weather is at its worst.

In addition, consider the boat docking or mooring line's best working capacity, maximum breaking strength and shock-absorbing qualities.

Once you have all this checked, make sure that you remember the rule about 1/8th of an inch in diameter for every 9 feet of boat length , and you won't go wrong.

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Choosing The Right Mooring Lines Or Dock Lines For Your Boat

Generally speaking, large and heavy boats need longer and thicker mooring lines, but not too thick to hitch around the cleat. The length of the lines can be the same or two third of your boat’s length, or two times greater than the water depth if you want more security in rough waters.

Table of Contents

Selecting the right line material

When it comes to choosing the right mooring line material, there are three main types of rope to consider – polypropylene, polyester, and nylon. Each of these rope materials has its own distinct advantages and disadvantages, so it is important to choose the one that best meets your needs.

Polypropylene is a light, inexpensive, and highly durable synthetic fiber. It is often used for short-term mooring in freshwater environments because it does not absorb much water and remains lightweight.

It does have a tendency to stretch when under tension, however, making it less suitable for long-term applications or heavy boats.

Polyester is more expensive than polypropylene but it is also very strong and resists abrasion and UV rays better than other materials.

Polyester is an ideal choice for permanent mooring in salt water , as it absorbs less water than nylon or polypropylene and is more resistant to UV damage. It is also less prone to stretching when under tension than other materials.

Nylon is the strongest and most expensive of the three materials, but it also absorbs the most water, which makes it less suitable for permanent mooring in saltwater environments.

However, it is more resistant to chafe and abrasion than the other two materials and is a good choice if you need a line with high strength and abrasion resistance.

Selecting the right line types

Mooring lines are essential components of boat safety and the quality of these lines can make the difference between a successful docking experience and a dangerous situation.

Selecting the right mooring line type is important as it will protect your boat from rubbing, dinging, scratching, and rash at the dock.

The most common types of mooring lines are three-strand nylon, double-braided nylon, and solid braid.

Three-strand nylon mooring lines are lightweight and stretchy, providing shock absorption in bumpy waters and protecting your boat from excessive force when docking.

Double-braided nylon lines are stronger than three-strand nylon and feature an outer braid that protects an inner core, making them more durable. They also provide good elasticity and excellent abrasion resistance.

Solid braid mooring lines are the strongest and most rigid type of mooring line, but they lack the elasticity of other types and may be too stiff for some boats.

When choosing the right mooring line type for your boat, consider the environment, size of your boat, amount of wind or current, and the materials you have on hand.

There is no single best mooring line type, but with careful selection, you can choose one that best suits your needs.

Selecting the right line diameter and length

When selecting the right line diameter and length for your mooring lines, there are a few key factors to consider. The most important factor is the size of the boat you are mooring, as this will affect the variety of sizes and types of lines you will need.

Typically, the larger the boat, the thicker and longer the lines will need to be. Additionally, take into account the size of the cleats on your boat as well as the type of hitch that you will use, you can not choose the line that is too thick to hitch around the cleat.

The number of lines also affects the thickness and length of your mooring lines. If you are using two or three lines per cleat, it is recommended to go for heavier and thicker lines for maximum strength. Generally speaking, one boat has 4 to 6 lines.

When selecting line length, consider the size of waves and water roughness as well as the distance from the boat to the moor.

It is best to have a line length at least two times greater than the water depth so that it can hold up even in rougher waters. some suggest the length should be the same as your boat or 2/3 of your boat’s length.

Should mooring lines be tight?

It is important to make sure that your mooring lines are tight, but not too tight. If the mooring lines are too tight, this can lead to damage to the vessel, dock, or mooring lines themselves due to the constant tension.

When adjusting the mooring lines, make sure that they are not too loose or too tight. If they are too loose, the vessel could drift and potentially cause damage.

Ideally, when a vessel is moored, the lines should be tensioned slightly. This is done so that when the vessel moves in the water, the lines don’t become loose and require frequent adjustment.

In order to ensure that the mooring lines are properly tensioned, check the line periodically throughout the day. If they are not taut enough, adjust them until they are just right.

In conclusion, it is important to make sure that your mooring lines are not too loose or too tight. This can help ensure that your vessel is properly moored and will reduce the chances of damaging the vessel, dock, or mooring lines.

How to secure mooring lines?

Once you have chosen the right type of mooring line for your vessel, the next step is to secure them properly. Securely mooring your vessel helps to ensure that it remains in place and does not drift away in windy or rough conditions.

The first step in securing your mooring line is to attach it to a sturdy object such as a cleat or post.

This will provide a firm anchor point for the mooring line. If attaching to a cleat or post, you should use a mooring line snap to securely connect the mooring line. Make sure that the snap is securely fastened so that it doesn’t come loose.

Once you have securely attached the mooring line to an anchor point, you need to make sure that it is taut.

You can do this by manually pulling on the line and making sure that there is some tension in the line. It is important to note that the line should not be too tight as this can cause damage to the cleat, post, or even the boat itself.

Finally, you need to tie off the mooring line so that it won’t come undone.

This can be done with a bowline knot, which is simple and reliable. To tie a bowline knot, start by looping the rope around your anchor point and then bringing one end of the rope up through the loop.

Then bring the end of the rope down over the standing part and back up through the loop again. Pull on the two ends of the rope to tighten the knot and make sure that it is secure.

By taking the time to secure your mooring lines properly, you can ensure that your vessel remains safely moored and doesn’t drift away in inclement weather.

What is the best mooring line for a mooring buoy?

For smaller vessels, polypropylene or polyester double-braided lines are generally used as mooring lines for mooring buoys.

These lines are highly durable, and come in a variety of sizes, making them an ideal choice for both recreational and commercial vessels.

Polypropylene and polyester lines also offer superior resistance to ultraviolet light and can withstand extreme temperatures.

For larger vessels, three-strand nylon mooring lines are preferred because they are the strongest and most resistant to abrasion and wear.

Three-strand nylon lines come in a variety of sizes, ranging from 8mm to 25mm in diameter. They can be spliced easily and provide superior strength when securing large vessels to mooring buoys.

Regardless of the type of line chosen, it is important to ensure that the line is long enough to reach the seabed and is properly secured with the correct knot.

It is also important to check the mooring line regularly to ensure it is in good condition and free from chafing or damage. Finally, if needed, adding chafe gear or protective covering around the mooring line can help protect it from the elements and improve its longevity.

What knot is used most often in mooring?

The most commonly used knot in mooring is the Bowline.

The bowline is an incredibly strong knot that can be tied with minimal effort and will hold firm even under tremendous strain. It is also very easy to tie, making it a great choice for beginners and experienced sailors alike.

The bowline forms a loop at the end of a line, creating an adjustable loop that can be tied off around objects or tied to other lines. It is also used to connect two lines together, allowing you to make a secure connection between two sections of rope.

When tying a bowline, the loop should be kept snug so that it doesn’t slip or become undone. A good rule of thumb when tying the bowline is to keep the loops tight enough that you can only fit two fingers between the coils.

This will help ensure that the knot will stay secure even under high stress and won’t come undone if the mooring lines get pulled tight.

Once the knot is tied, it should be tested by pulling on each side of the knot to ensure it stays tight and secure. This will help to ensure that your mooring lines stay in place and don’t come undone during use.

How do you clean mooring lines?

Cleaning mooring lines are a vital part of any vessel’s maintenance routine. Properly cleaning and storing your mooring lines will not only extend the life of the lines but also improve their performance.

When it comes to cleaning mooring lines, there are a few important steps to keep in mind. First, remove the line from the water, ensuring all debris is removed. Make sure you clean both the line and its fittings, such as shackles, eyes, or swivels.

Once you’ve removed the line from the water and any debris, give it a good scrub with warm soapy water and a soft brush. If you find any mildew or other discoloration on the line, you can try using a mild cleaner, such as white vinegar, to remove it.

After cleaning the line, rinse it thoroughly with fresh water and allow it to air dry completely before putting it away. It’s best to store your mooring lines in a cool, dry place out of direct sunlight. This will help prevent the lines from becoming brittle and breaking over time.

Finally, inspect your mooring lines regularly for signs of wear and tear. If you notice any fraying, cuts, or other damage, replace the line immediately to ensure your boat’s safety.

Taking these simple steps can help ensure that your mooring lines last longer and remain in excellent condition.

You might also like to read the below-related articles

Mooring Made Easy: A Step-by-Step Guide to Picking Up a Mooring for Your Boat

How to use navigation buoys to stay safe on the water? (Explained)

How To Care For Your Boat While You’re Away Short-term and long-term

How To Steer Your Boat Faster (Explained)?

Boat Hull Damage- How To Detect And Repair

Caring For Your Boat’s Hull – Why It’s Important And How To Do It?

• Mastering the Art of Boat Mooring: A Comprehensive Guide

Navigating the open waters demands more than just the thrill of the journey; it requires the mastery of a fundamental skill—boat mooring . Whether you find yourself at the helm of a sleek yacht, a versatile pontoon boat, or any other watercraft, the art of securing your vessel isn't just about tying knots; it's about ensuring safety and cultivating peace of mind amidst the undulating waves. This comprehensive guide invites you on a journey to explore the intricate facets of boat mooring, encompassing the foundational basics to advanced techniques that elevate your maritime competence. Join us as we unveil the secrets to a secure and confident mooring experience, regardless of your seafaring expertise. 

Understanding the Basics

A process that goes beyond a simple act of tying knots , mooring is the art of securing a boat firmly to a fixed structure, a vital maneuver preventing the vessel from untethered drifts and unwarranted movements. Whether it's a mooring buoy bobbing in open waters, a stable pontoon awaiting a boat's embrace, or the reassuring solidity of a dock, each scenario demands a nuanced approach. Before setting sail into the realm of advanced techniques, it is paramount to grasp the foundational basics of mooring. In this section, we embark on a journey to unravel the essence of boat mooring, where every knot and every connection is a declaration of maritime control and expertise. 

Types of Mooring Points

Embarking on a journey across the seas requires more than just a navigational compass—it demands a nuanced understanding of the diverse mooring points that await seafarers. Here, we explore three quintessential mooring points that stand as sentinels against the capricious tides:

Mooring Buoys

In the vast expanse of open waters, mooring buoys emerge as steadfast allies. These floating devices, firmly anchored to the sea floor, beckon boats to secure their mooring lines, offering stability in the midst of the fluid and unpredictable nature of the sea.

Mooring Pontoons

Harboring both convenience and reliability, mooring pontoons present a floating sanctuary for boats. These platforms, seamlessly connected to the shore or anchored to the seabed, serve as stable foundations for mooring endeavors. As vessels approach, pontoons extend a welcoming embrace, facilitating secure connections and ensuring a smooth docking experience.

Dock Cleats

Along bustling docks and harbors, the unsung heroes of mooring are the sturdy dock cleats. These fittings, strategically placed on docks, stand ready to shoulder the responsibility of securing boats. Designed with durability in mind, dock cleats become steadfast partners in the delicate dance between boat and shore, offering a reliable point of connection in the bustling domain of marine activity.

In unraveling the tapestry of mooring points, we discover that each holds a unique role in the maritime narrative, beckoning sailors to navigate their vessels with precision and confidence.

Essential Equipment

Setting sail into the realm of boat mooring necessitates more than just maritime know-how; it demands a keen understanding of the essential equipment that transforms the act into a seamless and secure endeavor. Here, we introduce the trio of indispensable tools that form the backbone of every successful mooring operation:

Mooring Lines

Consider mooring lines as the lifelines connecting your vessel to stability. These robust ropes play a pivotal role in the mooring process, serving as the literal ties that bind your boat to the chosen mooring point—be it a buoy, pontoon, or dock. Crafted from materials designed to withstand the rigors of the sea, mooring lines are the first and last defense against the whims of the waves.

In the intricate ballet of boat mooring, cleats take center stage as the performers facilitating the choreography. These fittings, strategically placed on both boat and dock, serve as anchor points for mooring lines. By providing a secure and reliable grip, cleats transform the potential chaos of unbridled movement into a synchronized dance between vessel and mooring point.

Enter the unsung heroes of boat mooring—the protective guardians known as fenders. As cushions strategically positioned along the sides of the boat, fenders act as a defensive barrier against the potential impact with the mooring structure. By absorbing shock and preventing unsightly dings and scratches, fenders contribute to the longevity and aesthetics of both boat and mooring point.

In the symphony of boat mooring, these essential equipment components harmonize to create a seamless and secure maritime experience. As you embark on your mooring journey, ensure that your arsenal includes these tools, each playing a distinct role in the safety and success of your seafaring endeavors.

Techniques for Boat Mooring

As the sea beckons and vessels traverse the waterways, the mastery of boat mooring techniques becomes a captain's artistry. Navigating the nuances of securing your vessel is a skill set that goes beyond the horizon. Let's delve into the techniques that elevate mooring from a task to a finely tuned maritime performance:

Approaching the Mooring Point

The prelude to a successful mooring begins with a measured approach. Slow and controlled navigation is the key symphony conductor, allowing the captain to assess the mooring point and make adjustments with precision. As the boat gracefully glides towards its destination, this deliberate approach sets the stage for a seamless mooring experience.

Preparing Mooring Lines

In the overture of boat mooring, the importance of preparation cannot be overstated. Have your mooring lines ready and properly coiled, akin to a musician tuning their instrument before a performance. This ensures efficient deployment and eliminates the risk of tangled lines, enabling a swift and secure connection to the chosen mooring point.

Choosing the Right Knots

The artistry of boat mooring extends to the choice of knots —a sailor's repertoire of secure ties. Learn and master knots such as the cleat hitch and bowline, each serving a specific purpose in the delicate dance between boat and mooring point. The right knot is not just a means of connection; it's a testament to seamanship and expertise.

Accounting for Wind and Current

Nature's interlude in the mooring performance comes in the form of wind and current. A skilled captain understands the environmental factors at play and adjusts their approach accordingly. Accounting for the invisible forces that shape the sea ensures that the mooring process unfolds with grace and control, even in the face of challenging conditions.

In the grand composition of boat mooring, these techniques harmonize to orchestrate a safe, efficient, and controlled connection between vessel and mooring point. As you navigate the waters, let these techniques be your compass, guiding you through the intricate steps of securing your maritime companion.

Mooring Safety Considerations

As the captain orchestrates the mooring ballet, safety takes center stage in this maritime performance. The sea, while enchanting, can be unpredictable, demanding a vigilant conductor. Here are the key safety considerations to ensure a harmonious and secure mooring experience:

Weather Conditions

Nature's temperament plays a pivotal role in the success of any mooring endeavor. Stay attuned to the weather forecast , for winds and storms can transform the serene seascape into a challenging stage. Adjust mooring techniques in anticipation of adverse weather conditions, ensuring that your vessel remains steadfast against the elements.

Checking Equipment

The reliability of your mooring operation hinges on the integrity of your equipment. Regular inspections are the overture to safety. Take the time to meticulously examine and maintain mooring lines, cleats, and other essential gear. A well-maintained ensemble ensures that every element performs its role seamlessly, reducing the risk of unexpected mishaps.

Boat Size and Type

In the maritime symphony, not all vessels dance to the same rhythm. Recognize that different boats have distinct mooring requirements. Adapt your techniques to accommodate the size and type of your vessel. From the nimble sailboat to the majestic yacht, tailor your approach to ensure that your mooring practices are finely tuned to the nuances of your maritime companion.

In the intricate choreography of mooring safety, these considerations form the melody that guides the dance between vessel and mooring point. Prioritize safety, be it in the face of changing weather or the routine check of equipment, and let these considerations be your compass on the journey to secure and confident boat mooring.

Read our top notch articles on topics such as sailing, sailing tips and destinations in our  Magazine.

Mooring yachts

Navigating the seas aboard a yacht adds a layer of sophistication to the art of mooring. As larger vessels command the waters, it's crucial to consider special considerations and employ specialized equipment. Delve into the nuances of mooring yachts with these focused insights:

Special Considerations

The grandeur of yachts demands an extra measure of attention to detail during the mooring ballet. Larger vessels, with their increased size and weight, may respond differently to environmental forces. Navigate with heightened awareness, considering factors such as wind, current, and the spatial requirements unique to yachts. A captain's discerning eye and a thorough understanding of the vessel's dynamics are paramount for a graceful mooring performance.

Yacht Lines and Cleats

Yachts, being the crown jewels of the maritime world, require a bespoke ensemble of mooring equipment. Familiarize yourself with yacht lines—robust, purpose-built ropes designed to bear the weight and dimensions of these majestic vessels. Explore the intricacies of yacht cleats, specialized fittings strategically placed to handle the forces exerted by large yachts during mooring. Mastery of yacht-specific lines and cleats is the key to a secure and confident mooring experience for vessels of grand stature.

In the realm of yacht mooring, precision and understanding are the compass points guiding the captain. Embrace the challenge of mooring larger vessels with the grace and finesse befitting their stature, ensuring that every connection to the mooring point is a testament to seamanship and mastery of the seas.

Legal and Environmental Considerations

As stewards of the seas, boat owners and sailors bear the responsibility of preserving the marine environment and adhering to local regulations. In the final act of our mooring guide, let's explore the legal and environmental considerations that underscore the importance of responsible seafaring:

Local Regulations

Before casting off into the waves, familiarize yourself with the maritime laws and mooring regulations governing your area. Different regions may have specific guidelines regarding mooring distances, permitted locations, and time restrictions. Adhering to these regulations not only ensures compliance but also fosters a harmonious coexistence with other seafarers and the coastal community.

Environmental Impact

The footprint left by boat mooring extends beyond the vessel itself. Practice responsible mooring to minimize environmental impact and protect delicate marine ecosystems. Avoid dropping anchor in sensitive areas such as coral reefs or seagrass beds. Opt for designated mooring zones when available, and be mindful of the potential repercussions of careless mooring practices. By embracing eco-friendly mooring, you contribute to the preservation of the diverse and fragile underwater world.

In the vast tapestry of maritime adventures, mastering the art of boat mooring emerges as a beacon of skill and responsibility. This guide, spanning the spectrum from fundamental basics to specialized techniques, equips seafarers with the knowledge to navigate the waters with confidence.

Understanding the nuances of boat mooring, employing the right equipment, and applying proper techniques become not just a skill set but a commitment to safety and environmental stewardship. Whether you're setting sail as a novice or as an experienced captain, may this guide serve as your compass, empowering you to embark on every journey with the assurance that your vessel is securely moored, and your impact on the seas is one of respect and care. Safe travels, and may the seas welcome you with open waves.

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Mooring Clearance

Anchoring clearance, standing rigging clearance, running rigging clearance, deck hardware clearance, chandlery clearance, safety clearance, the main factors to consider in selecting your mooring rope.

Stretch Factor – mooring lines need to absorb snatch loads and maintain the capacity to elongate and recover without suffering premature stress failure. Polyester has the required amount of working stretch for mooring and the ability to absorb surge loads can be enhanced with mooring compensators. Polypropylene stretches a little more than polyester. Nylon is the most elastic of the three materials, approximately 5-10% more elongation than polyester.

Strength and Durability – mooring ropes need to manage the substantial strain experienced in securing a yacht in your chosen configuration (the number of ropes that effectively divide the load) so relative diameter and break load are important factors. Nylon is initially the strongest mooring rope but it is a widely held belief that it loses 10-15% when thoroughly wet which brings it back to relative parity with polyester. Polyester has better UV resistance than nylon which means that it builds a small advantage each season resulting in a longer working life. Polypropylene is not comparable to the other two materials and should not be considered unless stepping up in diameter.

Abrasion Resistance – depends on what the rope is made from, how it is manufactured and to a lesser extent, the finished construction. Polyester and Nylon have comparable performance with Polypropylene, again a distant third. LIROS employ heat setting technology and special twisting techniques on the fundamental filaments and yarns to enhance wear performance.

Nylon shrinks when it is wet resulting in a tightening of the rope strands creating a harder, stiffer rope. This can be of benefit for permanent single purpose warps.

Comfort – rope construction and diameter make a difference to comfort, especially for more delicate hands. Braided Docklines are commonly regarded as the most flexible, luxurious handling rope for mooring. Octo (Anchor) plaited ropes are also flexible and comfortable to handle. 3 strand rope is generally regarded as less kind to the hands but is probably still the best all-round choice for most mooring applications.

Handling, Coiling and Hanking - rope construction dictates how you should hank a rope into a coil for stowing and throwing/heaving. 3 strand rope needs to be rolled around your thumb to keep the lay in regular form. Braided and Plaited ropes should be allowed to form a figure of eight shape, to ensure that you are not imparting twist into the rope.

UV Resistance – Everything degrades in the sun. The speed at which the deterioration occurs depends on what the rope is manufactured from. Polyester is best, with nylon a reasonable second and polypropylene a distant third. UV stabilising techniques help but don’t significantly alter the general comparable resistance values of each substance. Counteracting UV deterioration should be a major consideration for yachts in the Mediterranean and the Tropics.

Buoyancy - Polyester and Nylon both sink. Polyester is slightly heavier than nylon. Polypropylene floats. There are some applications where it is important that a line floats on the surface, but otherwise Polyester and Nylon are more durable fibres in terms of strength and resistance to abrasion and UV.

Summary - Polyester is the best all round fibre for mooring applications. Nylon has additional elasticity and can develop a harder finish which is of benefit for certain solutions. Polypropylene isn't really comparable and should only be selected to take advantage of the fact that it floats.

Single Purpose Mooring Lines

Single Purpose Mooring Lines are ropes made up to a specific measurement, spliced and finished to fit your home berth mooring configuration. These lines tend to be for more permanent arrangements, also known as Permanent Warps:

Mooring Strops and Mooring Bridles

Design Considerations and Plus Factors:

• You can select your preferred optimum rope for each purpose: base material (rope type), construction, diameter and exact length.
• Spliced loops to conveniently drop over cleats or bollards, remember to allow just enough extra to pull the loop to the furthest extremity of the horn, before it drops over and sits neatly around the cleat base. Spliced loops can be ordered with anti-chafe webbing fitted.
• Spliced thimble eyes for connecting shackles to rings, or other fixed attachments on the pontoon or harbour wall. Stainless steel connections reduce the chances of abrasion.
• Mooring Compensators threaded onto the lines before splicing, to add extra shock absorption where it’s most needed.
• Chafe Protection threaded onto the lines before splicing, to protect the most likely wear points.

Multi-Purpose Mooring Lines

Multi-Purpose Mooring Lines are generally longer lengths that can be deployed for varied tasks and tend to be for more temporary arrangements.

• You can select one rope type suitable for all your mooring requirements. This may help the crew to become more proficient at critical moments.
• Spliced loops on one end can be very helpful when trying to secure your yacht in difficult wind and tide conditions.
• All non-spliced rope ends should be heat sealed and whipped to prevent fraying.
• Bow and Stern lines can be made off and doubled back to make a spring.
• Longer lines can be deployed to attach directly to the pontoon, when your yacht is outside several others on a visitors pontoon.

Rafting Out and Towing Warps

It’s generally good practice to have two long lines in your rope inventory for when you’re rafted out on a visitor pontoon. It is not advisable or the done thing to rely on your inner neighbours to keep you securely moored to the jetty, by simply tying up to next door’s cleats. You will create extra load on their lines and fittings which will not be appreciated and in any case, may expose their lack of strength and suitability.

It’s also a good idea to consider a towing line for emergencies. Stowage room and extra cost may lead you to designate an existing mooring or anchoring warp for this purpose. Just bear in mind that the rope ends need to be finished in a versatile manner so that the line is genuinely multi-functional. A towing warp needs to be long and fairly stretchy so is reasonably compatible with doubling up as rafting out, kedge or drogue warps.

Compare the three main choices of Mooring Rope Construction:

3 strand also known as twisted lay .

The most popular all-round choice ~ optimum choice on all counts except for handling where it's not quite as comfortable as braided or plaited lines - and the least expensive of the three options.

Anchorplait, Octoplait 8 Strand

More commonly used for anchoring warp but has all the required properties for mooring, a little more comfortable to handle than 3 strand and on a par with Braided Docklines in terms of cost ~ 12 plait hollowbraid is available at a lower price point.

Braided Dockline

The most comfortable handling with all the benefits of polyester fibre, specially twisted filament yarn for optimum endurance.

Select the most suitable mooring rope to meet your requirements from the comprehensive range below.

Custom Build your rope selection into a finished mooring line, ready to use for your intended purpose

Jimmy Green Marine offer the following LIROS Mooring Warp rope options from stock in Beer, backed up by the premium supply chain uniquely offered to us in the UK by LIROS Yacht Ropes, Germany.

LIROS 3 Strand Polyester Article 00111/01110

Manufactured to DIN EN ISO 1141 standard (previously DIN EN 697, DIN 83331) The most popular choice for permanent pontoon mooring lines - Dependable strength and durable abrasion resistance combined with >15% working load stretch.

LIROS 3 Strand Polyester    Article 00111/01110

LIROS Braided Dockline Article 00133 (Porto)

From 10mm - 24mm diameter - 20 plait cover and braided core, 100% Polyester, special twisted twine construction: High elasticity >15% working load stretch - high load capacity - super flexibility - soft handling - balanced braiding, non-kinking - eminently throwable - excellent UV and abrasion resistance. The logical choice for mooring alongside.

LIROS Braided Dockline   Article 00133 (Porto)

LIROS Superyacht Dockline Article 01300

Available to order in 24mm, 28mm and 32mm diameter - 24 plait special coated cover and braided core, 100% Polyester, special twisted twine construction High elasticity >15% working load stretch - Highest load capacity - super flexibility - good handling - balanced braiding, non kinking - Superb weather and wear resilience.

LIROS Superyacht Dockline   Article 01300

LIROS Moorex12 Article 00132

Hollowbraid 12 plait construction, 100% Polyester > 15% working load stretch and dependable strength - spliceable, super flexible and throwable, excellent constructional shock absorption, ideal for guest lines.

LIROS Moorex12  Article 00132

LIROS Handy Elastic       Article 00136

Special 1:1 Plait cover and braided core, 100% Nylon (Polyamide), the ultimate shock absorbing mooring line >20% working load stretch, super pliable and comfortable in the hand - distinctive colour = navy with yellow markers.

LIROS Handy Elastic   Article 00136

LIROS Octoplait Polyester Article 01049

8 Strand, Balanced, Square Braid Construction, 100% Polyester - super pliable, spliceable to chain, Reliable load capacity and abrasion resilience combined with excellent constructional shock absorption >15% working load stretch.

LIROS Octoplait Polyester   Article 01049

LIROS 3 Strand Polypropylene Article 01120

Pliable, floating alternative with a finish very similar to 3 strand nylon and polyester mooring lines.

LIROS 3 Strand Polypropylene  Article 01120

LIROS Octoplait Polypropylene       Article 01078

8 Strand, Balanced, Square Braid Construction, 100% Multifilament Polypropylene - floats, very light and flexible, effective floating warp, good shock absorption >15% working load stretch. However, even after UV stabilisation, polypropylene is susceptible to deterioration in the sun and is not as strong as polyester.

LIROS Octoplait Polypropylene   Article 01078

Marlow BLUE OCEAN DOCKLINE

12mm, 14mm, and 16mm Diameter, braided construction, manufactured from 100% recycled plastic bottles, good abrasion resistance, good strength, excellent shock absorption, soft and supple flexibility, zero strength loss or shrinkage when wet.

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Mooring Lines: Types, Applications, and FAQs

What is a mooring line?

Mooring lines, also known as mooring ropes, are an essential component of maritime operations, serving as the link between vessels and the shore or other stationary objects. They play a crucial role in ensuring the stability of ships, boats, and offshore structures. In this article, we will explore the various types of materials available, their benefits in specific applications, and address common questions that arise.

Types of Mooring Line Materials

Mooring lines, come in a variety of material types, and should be selected to suit specific applications and environments. Understanding the advantages and disadvantages of different materials is vital for ensuring the proper functioning of mooring systems. Here are the primary types of mooring lines:

UHMWPE – HMPE Dyneema® mooring lines.

Ultra High Molecular Weight Polyethylene (UHMWPE), specifically Dyneema®, has revolutionized the maritime industry with its exceptional strength, lightweight nature, and durability, making it an ideal material for mooring lines in marine applications. Dyneema®, known for its extremely high strength to weight ratio compared to materials like Nylon, Polyester and steel wire rope, allowing for mooring lines that are easier to handle yet can withstand heavy loads and harsh environmental conditions.

One of the key advantages of UHMWPE Dyneema® mooring lines is their lightweight construction. Compared to Nylon, Polyester and wire rope, mooring lines of the same strength made from Dyneema® are much lighter, making handling and deployment easier for maritime personnel. Additionally, its low stretch properties ensure minimal elongation during use, providing enhanced stability and reliability during mooring operations. UHMWPE mooring lines resistance to abrasion and damaging UVA-UVB radiation and low coefficient of friction further contribute to its longevity and excellent performance in marine environments.

Furthermore, UHMWPE Dyneema® exhibits excellent resistance to chemicals and marine organisms, reducing the risk of degradation over time. This makes it a cost-effective solution for mooring lines, requiring less frequent replacement and maintenance. As the maritime industry continues to prioritize efficiency, safety, and sustainability, the adoption of UHMWPE Dyneema® mooring lines represents a significant advancement in meeting these objectives.

Nylon Mooring Lines

Nylon mooring lines, often referred to as mooring line boat ropes, are popular in the maritime industry due to their strength, elasticity, and with double braid constructions their resistance to abrasion. They are commonly used for various vessel types, including small boats, yachts, and larger ships. The elasticity of nylon helps absorb shock loads, making it ideal for situations where vessels may experience sudden impacts or dynamic forces. Many times, if the entire line is not made from Nylon we will use shorter sections linked to HMPE mooring ropes with the Nylon section acting as a shock absorber.

Polyester Mooring Lines

Polyester mooring lines, also known as marine mooring ropes or marine mooring lines, offer comparable strength to nylon and available with double braid construction and have superior resistance to UV degradation when compared to Nylon. These lines are suitable for long-term mooring applications, such as permanent installations in harbors and marinas. Polyester lines are known for their durability and resistance to stretching at nearly half the elongation of Nylon, making them a reliable choice for mooring large vessels.

Polypropylene Mooring Lines

Polypropylene mooring lines, often used for mooring smaller recreational boats, are lightweight and have excellent buoyancy. While they lack the strength of nylon or polyester, they are well-suited for temporary or short-term mooring needs for smaller vessels. Additionally, polypropylene lines are cost-effective, which makes them a popular choice for light-duty applications or as backup lines on vessels.

Wire Mooring Lines

Wire mooring lines, also known as mooring cables, are constructed from stainless steel or galvanized steel and are incredibly robust, making them suitable for heavy-duty applications. They are commonly used in offshore oil and gas platforms, large commercial vessels, and ships that require high tensile strength and minimal stretch. You will find a variety of mooring lines and rope for sale by clicking here

Applications of Mooring Lines

Mooring lines, including mooring ropes for tug boat operations and ships, are deployed across a wide range of maritime and offshore applications. Understanding the specific uses of mooring lines is essential to ensure safe and efficient operations in these scenarios. Here are some common applications of mooring lines:

Dock and Harbor Mooring

Anchoring and Mooring Buoys

Buoys, including boat mooring ropes, are crucial for marking channels, hazards, and providing anchorage points for vessels. Mooring lines are used to anchor these buoys in position.

Offshore Oil and Gas Platforms

Offshore drilling platforms rely on robust mooring lines, typically wire lines or ship mooring ropes to keep the platform in position, even in harsh sea conditions. These lines are critical for stability of the entire platform and the crew working on it.

Towing and Salvage Operations

Frequently Asked Questions about Mooring Lines

Understanding mooring lines involves addressing a variety of questions that often arise among professionals and enthusiasts in the maritime and boating communities. Let's explore some frequently asked questions and their answers.

How do I choose the best mooring line for my application

Selecting the appropriate mooring line depends on several factors, including the size and weight of your vessel, the mooring environment (harbor, offshore, or buoy), and the expected loads. Nylon and polyester lines are excellent choices for most recreational boats due to their strength and elasticity. Ensure the line's diameter and length are suitable for your vessel's size and the mooring conditions.

How often should I inspect and replace mooring lines?

Mooring lines should be regularly inspected for signs of wear such as cutting, chafing, deformation, anomalies in shape and UV damage. The frequency of inspection depends on factors such as environmental conditions and usage. As a general rule, recreational boaters should inspect their mooring lines before use and a more detailed inspection not to exceed 12 months and replace them when they show significant signs of wear. For commercial and offshore applications, more frequent inspections may be necessary depending on the environment, duration and severity of conditions. Training, knowledge and skillset are required for rope inspection and should always be performed by a qualified person.

What is the proper way to store mooring lines when not in use?

Mooring lines, including mooring rope for a boat, should be stored in a cool, dry place away from direct sunlight and moisture. Coil the lines neatly to prevent knots, kinks or twists, which can weaken the line over time. Regularly clean and inspect the lines before storing them, and avoid leaving them exposed to the elements for extended periods. When using cleaning agents ALWAYS consult the rope manufacturer for guidelines and direction with detergents and cleaning agents. In most cases mild agents such Dawn® dish soap and Simple Green® can be used. AVOID all bleaching and citrus based cleaning agents.

Can I use a combination of mooring line rope types for mooring ships?

Yes, it is possible to use a combination of mooring line rope types such as Nylon, Polyester and UHMWPE to achieve the desired balance of strength, elasticity, and cost-effectiveness. For example, you may use nylon lines for shock absorption and UHMWPE Dyneema® lines for their buoyancy in a buoy mooring system. Ensure that each line is appropriately sized for strength and spatial relation ensuring secure connection.

What is the breaking strength of a mooring line, and how is it determined?

The breaking strength of a mooring line, including ship mooring rope, refers to the maximum load the line can withstand before it breaks. It is determined through testing by manufacturers and is usually indicated on the line's label or packaging. The breaking strength depends on the material, diameter, and construction of the mooring line. It is essential to choose a mooring line with a breaking strength that exceeds the expected loads. This process uses the “MBS” or minimum breaking strength divisible by the “FOS” factor of safety also referred to as “Design Factor”. Through this process the Qualified person derives the “WLL” work load limit which shall never be exceeded.

• High Tensile Forces: Mooring lines, especially those made from materials like UHMWPE Dyneema, can experience high tensile forces during operations. If a rope breaks under tension, the release of energy can result in a dangerous snap back, posing a significant risk to anyone in its path.
• Whipping Effect: The snap back of a broken mooring line can create a whipping effect, which can be exaggerated when going around bollards or cleats, causing the loose end to rapidly move in unpredictable directions. This may lead to severe injury or death as individuals in the vicinity may be struck by the recoiling line.
• Projectile Hazard: In the event of a mooring line breaking, broken fragments or the entire line can become projectiles, posing a threat to personnel, equipment, and nearby structures. The force with which these projectiles travel can cause substantial damage.
• Abrasion and Wear: Mooring lines are subjected to constant environmental stress, including abrasion and wear. Over time, this can weaken the integrity of the ropes, increasing the likelihood of breakage. Regular inspection and preventative maintenance such as installation of chaffing protection are crucial to identifying and addressing potential issues before they escalate.

How do I attach a mooring line to my vessel and the mooring point?

The method of attaching a mooring line to your vessel and the mooring point varies depending on the specific hardware and setup. Common methods include using cleats, knots (such as the bowline or cleat hitch), and specialized hardware like shackles and thimbles. Follow the manufacturer's recommendations and best practices to ensure secure and reliable attachments.

Are there any eco-friendly mooring line options?

There is a growing interest in eco-friendly and sustainable alternatives to traditional mooring lines, including mooring lines for ships. Some manufacturers now offer mooring lines made from recycled materials or biodegradable options. These eco-friendly lines aim to reduce the environmental impact of discarded or lost mooring lines in oceans and waterways.

Mooring lines, including mooring ropes for boats and ships, play a vital role in maritime operations, ensuring the stability of vessels in a wide range of applications. Understanding the types of mooring lines available and their appropriate applications is crucial for anyone involved in boating, shipping, or offshore industries. By addressing common questions and providing insights into mooring line selection and maintenance, we hope to enhance your knowledge and promote safe and efficient mooring practices in these vital sectors.

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2024 Pursuit OS 445: An Overview

Boat safety 101: exploring the serenity and adventure of boating, the moment of truth – 6 signs you need a new boat, eco-savvy sailing: expert tips for reducing fuel costs and enhancing your boating experience, 2024 aquila 47 molokai review, 2024 sea-doo switch 13 sport review, 2024 aspen c120 review, choosing the best dock lines for your boat.

Dock lines are an essential accessory for boat owners, ensuring the safe and secure mooring of watercraft at marinas, docks, or any other locations where boats are held in place. In this guide, we will explore the factors to consider when choosing the best dock lines for your watercraft, including the material, the size, and the versatility available with various dock lines.

Material: What Dock Lines Are Made Of

There are a few different materials commonly used in making dock lines, each offering unique benefits and trade-offs that boat owners should consider.

Nylon: Durability and Elasticity

Nylon is the most popular material for dock lines due to its excellent strength, abrasion resistance, and UV tolerance. With a natural stretchiness that allows the rope to absorb sudden shock loads and flex with waves or boat movement, nylon lines can help prevent stress on your boat’s cleats and chocks.

Polyester: UV and Abrasion Resistance

Polyester is another material with properties that make it a good choice for dock lines. Although not as stretchy as nylon, it has high UV resistance and incredible abrasion resistance. This can make it a better choice for boats docked in areas with harsh sunlight or chafing on cleats.

Polypropylene: Lightweight and Inexpensive

The third common material is polypropylene. While it is more lightweight and buoyant than nylon or polyester, it has lesser strength and is not as abrasion resistant. This material is generally best suited for smaller boats or as temporary dock lines.

Size and Length: Finding the Right Dimensions for Your Boat

Sizing Guide

The size of your dock line should depend on the size of your watercraft. As a general rule, choose 1/8 inch of line thickness for every 9 feet of boat length. For example, a 36-foot boat would need dock lines with a 1/2-inch diameter.

When it comes to the length of your dock lines, you will need three types: bow lines, stern lines, and spring lines.

Bow Lines: These lines attach to the front of the boat and should be roughly equal to the boat’s overall length.

Stern Lines: The rearward lines, stern lines should be approximately 2/3 of the boat’s length.

Spring Lines: These lines run diagonally from the bow and stern to the dock to prevent the boat from moving forward or backward. Their length should ideally be 1.5 times the boat’s length.

Rope Construction: Brait, Double Braid, or Three-Strand

Brait (Octoplait)

Brait dock lines use an 8-strand construction that resembles a square. This type of line is known for its high shock absorption and excellent abrasion resistance. It is easy to handle, but can be bulkier when coiled or stowed.

Double Braid

Double braid dock lines have a braided core and a braided cover, creating a strong, flexible, and easily managed line. They are popular among boat owners due to their strength, comfortable handling, and attractive appearance.

Three-Strand

Three-strand dock lines have a twisted construction and are generally the most affordable option. Although not as elegant as braided lines, they are strong, durable, and easily spliced or repaired. This is a dependable option, but it can be more challenging to handle and coil.

Choosing the best dock lines for your boat involves considering the material, size, and construction of the lines. Nylon and polyester offer the best mix of strength, durability, and UV resistance, while polypropylene may work best for smaller boats as temporary lines. Size your lines using the standard 1/8 inch per 9 feet ratio and account for the appropriate lengths of bow, stern, and spring lines. Finally, choose a construction that meets both your preferences for handling and appearance. By following these guidelines, you’ll be able to select the best dock lines to suit your specific needs and keep your boat secure in any mooring situation.

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Choosing the Right Dock Line & Mooring Rope

As a general rule, the length of bow and stern lines should equal two-thirds of your boat’s overall length. Spring lines should be slightly longer, approximately the same length as your boat. Spring lines keep the boat snugly near the dock by preventing it from moving fore or aft, while allowing for the rise and fall of the tide. Keep in mind; the position of cleats on your boat and dock may affect the length of the dockline.

Unless your boat is unusually heavy or will be subjected to severe conditions, a bow line, stern line, and two spring lines are recommended. If your permanent slip has outboard pilings as well, you will need an additional bow and stern line.

When making a choice of line for your boat, keep in mind that 12-strand ( Mega Braid or Brait) line is not as strong as double braid line and colored line is not as strong as white line. Different braids have different attributes and tensile strengths can vary by as much as 15%. Make your choice accordingly.

Nylon for Dock & Mooring Lines

Rope inc. recommends using nylon rope for dock and mooring lines ; the stretch characteristics of nylon absorb shock and will resist damaging cleats on your boat and on your dock. Nylon is available in 3-strand or twisted line, 8-strand , 12-strand or Mega Braid and in a double braid or yacht braid.

Our dock and mooring lines are made to order, are professionally spliced and the bitter end is hand whipped to prevent the line from unraveling.

Chafe Protection

Be sure to use proper chafe protection where dock and mooring lines may rub on chocks, gunwales, hawse pipes or docks. Constant chafing on one area of the line for prolonged periods is a mooring rope’s worst enemy; it can quickly wear, melt or cut through in adverse conditions. Ballistic nylon (Cordura) tubing, leather or urethane dips are available for chafe protection if required.

If your boat is heavier than average, or has greater windage, or is docked where it is subjected to surge, you should choose the next larger size.

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How to find the right mooring line for your boat

Mooring lines are used to secure your boat to jetties, pontoons, quays or anchor buoys. Whenever your boat is not in use, mooring lines ensure that your vessel is held safely and securely at the mooring. So, it's important that your mooring lines can reliably hold the weight of your boat and are of good quality. Here, we tell you what you need to look out for when choosing mooring lines.

Table of Contents

• What makes a good mooring line
• Mooring line rope constructions

Mooring line material

• Polypropylene
• What diameter for mooring lines?
• How long must mooring lines be?

Why splice mooring lines?

• What accessories for mooring lines?

What makes a good mooring line?

An important feature of a good mooring line is a high degree of elongation . If the mooring line doesn't have a certain degree of elongation, the movement of the boat caused by wind and waves puts unhindered force on the cleats or grommets on which the rope is fastened to. A mooring line absorbs this kinetic energy, which not only prevents possible damage, it also makes the time spent on board more pleasant. Similarly, a mooring line must have a high breaking force to be able to secure the boat, even in stormy weather and heavy swell. The necessary breaking force depends on the size of the boat. We recommend always being generous when considering breaking force, as even slight chafing will weaken the rope considerably - and there are plenty of places where mooring lines can chafe, such as on fairleads, chocks etc. Mooring lines should therefore be robust. They should also have good flexibility and grip, so that managing the lines, coiling and making knots or splicing is easier. Finally, UV resistance is important. Mooring lines which are left permanently at the berth should not be allowed to become porous or brittle.

What kind of rope constructions are used for mooring lines?

Three different rope constructions are used for mooring lines:

• Twisted rope: With twisted rope two or more strands are twisted around each other. This type of rope is stretchable, can be easily spliced and is cheap to buy. However, it isn't overtly flexible and kinks can develop after some time.
• Square braid: Square braided ropes, also called square lines, are very supple and have the best stretchability of all fender lines. The rope is easy to tie and stow and does not chink. The only disadvantage of square braid is that the rope tends to string.
• Double braid: This rope is particularly robust and supple. Elongation depends on the material, but is usually lower than with square braids.

What material for mooring lines?

The most commonly used mooring lines are made of polyester, polyamide, also known as nylon, and polypropylene. All three materials have their advantages and disadvantages.

Polyester mooring lines

Polyester mooring lines are particularly UV-resistant. Furthermore, in terms of breaking strength, shrinkage and abrasion resistance, polyester lines are superior to those made of polyamide or polypropylene. The material is also relatively cheap, high grip and only absorbs a little water. The only disadvantage of polyester mooring lines is that they are not particularly stretchy. So, you should either use very long mooring lines or a snubber. For a particularly good quality line, we recommend purchasing polyester mooring lines with square braiding. These provide excellent grip, are very elastic and completely free of kinks.

Mooring Compensator

Polypropylene mooring lines

Polypropylene is the lightest of all textile fibres. It absorbs practically no water and is floatable. As a result, mooring lines made of this material are less likely to be caught on the boat propeller when manoeuvring in the harbour. Polypropylene is also very resistant to chemicals. Unfortunately, these ropes are much less UV-resistant, more prone to abrasion, have a lower breaking force and are generally less durable than mooring ropes made of other materials. They should only be used if you need a floatable line (i.e. for towing) and, if possible, only in sheltered berths. As a precaution, order with a larger diameter than necessary.

Polyamide mooring lines

The advantage of polyamide mooring lines is that they yield up to 10% more stretch than polyester ropes. They are the most elastic of all materials used in the manufacture of mooring ropes. For many years, polyamide ropes quickly became very stiff and hence unmanageable. This is because polyamide absorbs a lot of water. In the meantime, however, polyamide lines have now been much improved by manufacturers.

Which diameter for mooring lines?

The right diameter for mooring lines depends on the size of the ship. For yachts with a length of ten metres and a displacement of four to five tonnes, mooring lines with a diameter of 12 to 14 mm are suitable. To determine the necessary diameter of mooring lines for your boat you can use the following table for help:

How long should mooring lines be?

As regards the length of mooring lines, it is recommended to have four lines on board, two in the length of the boat as stern lines and another two approximately twice the length of the boat width for the bow to moor as 'med style' or 'stern to berth' with pillars or lead lines or four boat's length lines to moor bow and stern plus springs. This way you will be well equipped for various ports and moorings. Furthermore, one or two longer lines are recommended to be kept on board, which you can use as manoeuvring or towing lines or as a shore line for lying in a packet. These lines may be at least twice the length of the boat.

A spliced rope has a significantly higher breaking load than a knotted rope. It is recommended to have mooring lines that are precisely made to measure, above all for your regular berth. But a spliced thimble or eye can also be quite useful when sailing. The rope can be attached directly to the ring on the pier or the harbour wall, or it can be coiled and secured by belaying pins without reducing the breaking load of the rope with a bowline. We can supply prefabricated mooring lines with various eye diameters, simple or reinforced stainless-steel thimbles, leather sheathing for reinforcement or spliced-in dampers. You can, of course, also have us configure a mooring line of your choice and have it manufactured according to your specific requirements.

Spliced mooring lines

Which accessories for mooring lines?

So that your mooring line is at hand at when you need it, we offer various hooks and rope holders. Depending on the model, the hooks can either be fixed on board, for example to the bow or stern pulpit, or they can be installed at the jetty, so that you can easily reach your mooring lines at fixed mooring points and manage them easily.

Accessories for mooring lines

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Best boat rope: Twisted and braided options for docking your yacht

• Phil Sampson

Phil Sampson takes a look at 10 of the best boat rope options on the market, including twisted and braided versions suitable for docking

‘Give ’em enough rope…’ You know the rest; it’s an expression that’s been around for more than 350 years. But there’s one place this time-honoured truism doesn’t hold true, and that’s on a boat, where not only do you need enough rope but also rope of the correct type and size to match the purpose for which it is intended.

So where to start? Broadly speaking, there’s four main types of ropes for boats, the most common of which are nylon and polyester. Both are super strong and salt water resistant, with nylon being the more elastic of the two. Polyester, on the other hand, has better UV resistance, so is likely to last a little longer.

Next comes polypropylene, which as a floating rope has specific uses, such as water-skiing or as a safety line marking the direction of current for swimmers. Then there’s the natural fibre ropes such as coir, cotton, hemp, sisal or jute often seen on classic yachts – although synthetic lookalikes are available too.

Article continues below…

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Next, there’s the question of twisted or braided. Twisted rope is generally less expensive and relatively easy to splice. While stiffer and less bendable than braided rope, it is actually the more stretchy of the two. It’s also worth remembering that twisted rope has a tendency to hockle, (twist against the lay), and/or kink. In addition to arguably being more attractive, braided ropes are the more pleasant to handle due to their being more flexible than twisted ropes

The third consideration is rope diameter. The strength of modern boat ropes means that tales of mooring lines snapping are few and far between in our experience. As a general guide, 10 mm rope is recommended for craft of 8 metres or less. Thereafter, increase the diameter by 2 mm for every 2 metres of boat length – so 16 mm rope would be the choice for a 14 metre boat.

Here’s our selection of the best boat ropes:

Best boat rope on the market right now

OROOTL premium nylon braided mooring line

While fishermen may associate OROOTL brand with spinners and lures, a range of premium quality boat ropes are also marketed under the name. These are high strength nylon lines which are double braided to prevent fraying and chafing.

Resistant to oils, moisture and abrasion, a choice of three lines are on offer, each of which comes with a 12″ eye spliced into one end. The 3/8″ diameter line is offered in lengths of 16.5 or 25 feet for 20 feet boats.

Middle of the range is the 1/2″ line, which is sold in 25 or 50 feet lengths for 20-30 feet boats. The thickest line, 5/8″, also comes in 25 or 50 feet lengths and is recommended for 20-40 feet boats.

Price: £14.99 – £33.99

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Direct 2 Boater reflective line

A product especially useful after dark is this high quality, double braided nylon line which reflects light from nearby sources thereby enhancing its visibility and safety.

Available in four colours – black, gold/white, blue and white – this boat rope is offered in three diameters – 3/8″, 1/2″ and 5/8″ – and lengths from 15 to 25 feet.

Its nylon construction is oil- and marine growth-repellent, offers a high level of UV protection and, the maker says, it won’t stain decks. Suitable for boats from 25-45 feet in length, each line comes complete with a professionally pre-spliced 12″ eye.

Price: 19.00 – £44.06

Neptune’s Locker nylon mooring rope

This 1/2″ (12 mm) diameter nylon dock or mooring line is offered in a choice of five colours: white, red, blue, green or black. Each line is 20 feet (6.1 metres) long and has a 12″ (30 cm) eye professionally spliced at one end.

The double braid construction employed in these ropes is strong, flexible and easy on the hand. Being made of nylon means these lines will stretch to provide protection against sudden loads or wash from passing vessels, making them a good all round choice for use in a wide variety of situations.

Price: £10.19

Buy it now on eBay

Hi-vis polyester braid on braid

There’s no question that boat ropes can present a significant trip hazard, so why not consider opting for high visibility lines such as this double braided offer from eBay seller, Lion Trading Limited?

Prices begin at just £1.00 per metre for a 6 mm rope, rising to £2.00 per metre for the 12 mm version. Eight and 10 mm options are also available.

Made of 100 percent polyester, these ropes are low stretch, UV protected, abrasion and friction resistant and offers resistance to many common chemicals.

In terms of breaking strain, they’re tough too – the 6 mm option can take 770 kg and the 12 mm, 1,350 kg.

Price: From £1.00/metre

Double braid polyester mooring rope

This product from London-based Rota Marine, a well-known name in the boat rope world, is a 100 percent polyester rope with a 24 strand outer cover over a 12 strand inner core.

Sold in three diameters – 14 mm, 16 mm and 18 mm – these lines have a break load strength of 4,370 kg, 5,630 kg and 6,510 kg respectively.

Available in either navy blue or black and lengths of 6, 10, 15 and 20 metres, each line comes ready-to-go with one end spliced with a 35 cm (approx) eye and the other end hot sealed.

All splicing is carried out in the firm’s own warehouse and custom splicing is available on request.

Price: £25.00

Rota Marine polyester braid on braid

Our second boat rope from Rota Marine, this 10 mm braid on braid line, is typical of the company’s products. Made from 100 percent polyester and supplied in lengths from 5 to 25 metres, this is a rope designed not only to perform well but also to look good by virtue of its flecked pattern.

The options available are white with blue, green, red or yellow fleck, so should colour-coordinate with most boats. Featuring a high tensile strength, these ropes are designed to be long lasting and non-kinking.

Price: £9.36 – £44.88

Pindex twisted docking rope

With a breaking strength of 5,850 pounds, this 3/4″ (19 mm) docking line from Pindex is a mighty beast indeed. That said, the 30 metre length on offer here weighs just 3.4 kg, or about 7.5 lbs in old money.

Made of nylon for high strength and impact resistance, this boat rope comes complete with a stainless steel thimble held in position by a splice at the end of the rope. The other end of the line, (aka the bitter end), is heat sealed to provide a good grip.

In addition to its mooring uses this boat rope is well suited to a number of other applications, including hauling and lifting.

Price: £45.97

Tribord floating tow line/rope

Sports retail giant Decathlon offers this brightly coloured floating rope under its Tribord brand name. Designed primarily for towing lifebuoys or small boats, it’s a highly visible and stretchy line – its elongation rate under tension is 7%, which equates to 7 cm for every metre, meaning it has excellent shock absorbing properties.

The line is 8 mm (0.31″) in diameter and comes in 10 metre (33 feet) lengths. Weighing in at just 23 grammes per metre, and with a tensile strength of 550 kg, this rope is a keenly-priced option well worth considering.

Price: £17.99

Buy it now on Decathlon

Floating safety rope

Regular Southampton Boat Show visitors are sure to know the name of bespoke rope specialist, Jimmy Green Marine. The rope we have selected here is one of the many floating rope options offered by the Devon-based firm.

Sold in a 50 metre cut length for the bulk buyer, or by the metre for retail customers, this LIROS 8 plait line is made from spin-dyed, UV stabilised, flexible multi-filament polypropylene.

Manufactured specially for Jimmy Green Marine, this flexible, lightweight boat rope comes in yellow with a red fleck, making it highly visible and therefore ideal for throw lines and safety rope applications.

Price: £43.00 for 50m of 5 mm line.

Buy it now on JimmyGreen.com

vidaXL jute rope

Made of 100 percent jute, this is very much a line for classic yachts and the purists among us. In addition to its fabulous look, touch and feel, this rope has excellent environmental credentials; it’s a completely natural material and is fully recyclable.

Although listed as being unsuitable for lifting or climbing, vidaXL’s jute rope does offer good tear and abrasion resistance and is accordingly very durable.

There’s no question it would also look great when attached to any craft which justifies the investment in a traditional line such as this. The price quoted here is for 100 metres of 20 mm marine sailing rope.

Price: £161.00

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Choosing the best rope for mooring a boat

Going sailing or boating?

Be sure to invest in the correct mooring ropes . Not only do they provide additional safety for you and your passengers, they can also prevent a lot of unnecessary damage (and expense!) – and are, arguably, one of the most important pieces of equipment onboard.

Three mooring lines are often used to moor a boat:

• Bow line – which secures the bow to the dock
• Stern line – which holds the stern of the boat to the dock
• Spring line – to prevent any surges backwards and forwards

When buying these mooring lines, there are three main factors to consider. Here we outline each in turn and offer our expert advice on the best products available.

3 factors to consider when buying rope for mooring

As a general rule-of-thumb, bow and stern lines should be at least half the length of your boat, and long enough to be accessible from the cockpit. Spring lines should be the full length of your boat or longer. So, first things first, take a look at your vehicle’s technical specification or get out the tape measure and establish its exact length.

It’s also a good idea to carry one additional mooring line, around five times the size of your boat. Not only will this serve as a good backup, but it could also be a great help in tough conditions.

If in any doubt, your manufacturer, club or boating forum should be able to provide advice.

2. Diameter

If you are choosing conventional mooring ropes*, then as a general rule of thumb, the bigger the boat, the thicker the mooring rope you will require. Below is a list of the most common hull lengths and the recommended rope size for each, using traditional mooring ropes.

If your sailboat falls somewhere in between these categories, it’s usually worth opting for the bigger diameter – just to be on the safe side. For particularly heavy boats (relative to their length), we also recommend going one size up (e.g. 12mm mooring line for a 26ft hull length).

3. Material

Primarily, mooring ropes need to be strong and sturdy enough to hold the weight of your vessel securely. They also need to be able to stretch and recover from elongation – without suffering any damage or breaking. And should demonstrate good resistance to UV and abrasion.

With these desirable traits in mind, the best mooring ropes are typically made from lightweight yet robust synthetic fibres. And the three most common include polyester, polyamide (nylon) and polypropylene.

All three of these materials have their pros and cons, and the right option for you will depend on the size and weight of your boat and whether you wish to moor it on a short or long-term basis.

Polyester mooring ropes

Polyester is regarded as the all-round best option.

It’s superior in terms of strength, even when subjected to prolonged or repeated stress. It resists wear and tear from the environment – particularly UV and abrasion. Plus, it absorbs very little water and doesn’t shrink when wet.

Polyester mooring lines are the least elasticated option out of the three. However, they still typically demonstrate sufficient stretch for most mooring applications. And the ability to absorb surge loads can always be enhanced with mooring compensators.

Polyamide mooring ropes (nylon)

Technically speaking, polyamide is the strongest rope for mooring . But it’s important to keep in mind, it loses 10-15% of this strength once submerged in water – which means, when used for mooring, it offers approximately the same level of strength as polyester rope.

It also matches polyester in terms of UV and abrasion resistance.

However, as polyamide absorbs water and shrinks when wet, the rope strands tend to tighten – leading to a harder and stiffer rope. This can be beneficial for permanent or long-term moorings.

Polypropylene mooring ropes

Polypropylene ropes absorb virtually no water, and as they float, they can be easier to handle. They’re also typically cheaper, offering greater value for money for those on a budget.

However, they’re not comparable to polyester or polyamide with regard to strength or durability. And therefore, they should only really be selected if you wish to take advantage of the fact they float.

* As an aside, we have supplied 48mm HMPE rope for use as a mooring rope, but we suspect this was for a pretty huge commercial vessel – not an everyday mooring rope that the average skipper would need!

Mooring rope at RopesDirect

So, whether you’re the new proud owner of a dingy, sailboat, narrowboat, motorboat or high-end yacht, we guarantee – here at RopesDirect – we have the ideal ropes for mooring.

In most cases, we recommend the Kingfisher Ready-Spliced Docklines . Constructed with a polyester cover and a braided nylon cord, these offer the best of both materials and boast all of the important qualities outlined above. And they come in a broad spectrum of diameters (12-16mm) and colours, with something to suit most boat styles and sizes.

We also stock 3-strand polyester ropes and 3-strand multifilament polypropylene ropes .

Whichever option you choose, all of our mooring ropes for boats and dock lines are available for a competitive price. And with ample stock in our warehouse, they’re eligible for next working day delivery.

So, why not take a look today? Select the ideal mooring ropes from our collection, check out our blog on ‘ how to moor a boat with the correct ropes ’ and ensure you’re fully prepared.

If you have any questions or would like further advice on the best rope to moor your boat, you’re welcome to get in touch at any time. Our team have excellent knowledge of the products available and they’re always happy to help. Just send an email to [email protected] .

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MOORING LINES

 with a global network of premium rope manufacturers, we can offer you the best mooring lines based off your budget and/ or requirements.   our industry experience from working onboard superyachts and within the supply chain provides us with the knowledge and expertise to offer advice on all mooring lines and tender tow lines for superyachts. whether it is outfitting a new build, replacing existing worn mooring lines, or expanding your selection onboard, no enquiry is too big for us  , brands we supply: ​, gottifredi maffioli, do you need new or replacement mooring lines .

Or would you like to upgrade your current setup?

Heaving lines, mooring line splicing, custom  labelling, leather chafe protection, testimonial, " polaris yacht supply recently supplied me with six new mooring lines for sy atao. from start to finish, my experience with polaris yacht supply was exceptional, and i couldn't be more satisfied with the service they provided. first and foremost, the quality of the mooring lines i received were of the highest standard. the lines are sturdy, durable and expertly crafted, providing me with the confidence and peace of mind i need when securing the yacht. polaris yacht supply clearly pays attention to detail and ensures that their products meet the highest standards of excellence.  moreover, the entire process of working with polaris yacht supply was seamless and efficient. the company demonstrated a deep understanding of the yacht's specific needs and requirements, offering personalised solutions that perfectly matched the yacht's specifications.  they consistently communicated with me promptly, keeping me informed about the progress of my order and ensuring timely delivery. the entire transaction was hassle-free, and their commitment to customer satisfaction was evident throughout. i whole heartedly recommend polaris yacht supply to anyone in need of yacht equipment and supplies. their dedication to delivery high-quality products, combined with their exceptional service, sets them apart from the competition. i have no doubt that i will be returning to polaris yacht supply for any future needs that may arise." captain, sy atao   - 25m jfa.

CHAFE GUARDS

We have a variety of options available depending on your requirements for chafe protection. from fluffy shearling to our ballistic chafe guards, we have a solution that will protect your cap rails, bulwarks and mooring lines from wear and tear.   , protect your brightwork with our chafe guards.

Suitable for all sizes of mooring line!

The ultimate chafe guard. woven from 100% natural sheepskin. perfect for painted and gel coated surfaces, uv resistant, yet cost effective. suitable for both docks and painted or gel coated surfaces. , highly durable and hard wearing, designed to withstand the harshest environments.

Best Ropes For Mooring Lines

Last Updated by

Daniel Wade

April 11, 2023

‍ Key Takeaways

• A rope for mooring will help keep your boat safe, but you will need more than just one
• Dock lines come in all shapes and sizes, so research is needed to find the best for you
• Materials, diameter, and the length of the mooring line determine what works best
• Nylon rope is the best material, so consider a nylon mooring line for your boat

‍ When securing your boat, you need to make sure your dock lines are going to handle the job. But what is the best rope for mooring lines?

When choosing mooring lines, you should consider the material, diameter, and length of the rope. A twisted rope, square braid, or double braid made out of nylon or polyamide is best. Brands like INNOCEDEAR, LIROS, Kohree, and ACY Marine make great quality mooring lines using the best materials.

Mooring your watercraft securely requires strong ropes, but you do not have to spend a fortune. Thankfully, despite the abundance of options available, only a select few are actually worth your investment, saving you the hassle and expense of trial and error.

Table of contents

‍ Best Mooring Lines to Consider

Dock lines are meant to keep your boat secure when tied to a dock, making them very important accessories for boat owners. Depending on the environment, you might need to have some of the best mooring lines possible without breaking the bank. Below you can see seven of the best mooring line brands to consider:

INNOCEDEAR offers double-braided dock lines made out of military-grade nylon, making them durable and shock-absorbent while also keeping your boat secure. Additionally, the damage-resistant fibers can withstand harsh weather conditions, saltwater, and sunlight.

LIROS delivers quality 24-plait coated cover and a braided polyester core. Its twisted twine construction provides high elasticity with over 15% working load stretch, while maintaining a balanced braiding and excellent handling.

This rope is super flexible, non-kinking, and has superb resilience against wear and weather. It also boasts the highest load capacity, up to 32mm in diameter.

Kohree's double braided ropes are ideal for harsh weather and waves when docking your boat. These nylon ropes are soft yet strong, absorb shocks well, resist abrasion and UV damage, and are suitable for salt water, oil, and rot.

They are also stretchable with excellent shock absorption, easy to handle, and do not spread out easily. The high-quality ropes have a tensile strength of 4,480 pounds and can handle working loads of up to 820 pounds. Each rope includes a 12 foot eyelet and heat-sealed bitter end.

ACY Marine Dock Line

Top-quality dock lines from ACY Marine are highly durable and tested to endure stress. With a unique 12 spliced eye for easy docking and stretching, it has UV protection to maintain appearance and is flexible and abrasion-resistant, reducing maintenance costs.

Jranter bungee dock line offers a great product with the use of polypropylene ropes. Their dock lines are strong and durable, featuring a bungee cord inside and a PE braided rope outside with triple stitch reinforcement at the ends. While these are ideal for small to medium boats, they can stretch out in a range of four to five feet, with slightly longer sizes available.

The bungee cord acts as a snubber, absorbing shock to protect boats, cleats, docks, and pylons. The loop design is easy to tie off to the dock, and the removable sleeve tube allows for a tight attachment to the cleat.

New England Ropes Mooring Line

New England Ropes company has everything you could possibly imagine when it comes to a selection of lines for you boat. They feature plenty of different options, such as diameter, colors, and even materials.

Their premium three-stranded nylon rope treated with Marine Tech coating, is a highly sought-after product due to its exceptional wet strength and improved fiber-to-fiber abrasion, making it one of their top-selling items.

For tough, all-weather rope needs, SGT KNOTS offers their Twisted Nylon dock line. Its 100% composition is the strongest widely used, outperforming natural fiber ropes in various applications no matter how tough the job is.

It is resistant to moisture, oil, grease, and chemicals, it withstands prolonged use in harsh conditions without rotting or decaying. The rope's impressive strength and elasticity guarantee optimal energy absorption, tautness, ease of use, and reliability. This is not only ideal for boats, but has been used on oil rigs, ranches, and more.

Why Use a Mooring Setup?

To secure a watercraft, either a shore fixture like a pier or an offshore fixture like an anchor mooring can be used based on factors like weather and water depth. Mooring lines, anchors, and connectors form the system's primary components, with anchors needed for offshore fixtures lacking onshore options.

Boat owners use these components to attach to a mooring fixture so they can park their boat. Without proper lines and a mooring system in place, boats are at risk of floating away and being damaged along the way.

What to Look for in a Mooring Line

To ensure the optimal performance of your boat, it is crucial to select the most suitable mooring line from the various types available. With numerous options to choose from, this can be daunting, particularly for beginners in boating. Nevertheless, being selective will help you find the right mooring line for you.

Materials of Mooring Line

Nylon is the preferred material for mooring lines due to its strength and ability to absorb shock and return to its original length. Nylon mooring lines are also highly resistant to abrasion, UV exposure, mold, and water. While it may degrade in high temperatures, this is unlikely to occur in a marine environment.

Size in Diameter

Mooring lines' diameters vary and it affects their performance. Typically, a mooring ropes’ size should be around 1/8 inch per nine feet of boat length. For example, a boat of 27 feet or less should use a 3/8-inch mooring rope, while a boat of 35 feet or less should use a half-inch rope.

Length of Mooring Ropes

To determine the right length of your mooring lines, you should consider using bow and stern lines that are around half the length of your boat. So if your boat is around 37 feet, then the bow and stern lines should be 18.5 feet. Spring lines should be at least as long as the boat, but can be longer, and never shorter.

Does a Mooring Rope Use Synthetic Materials?

A mooring rope would typically consist of polyester, polypropylene, polyethylene, or polyamide, often in combination with one another. With that being said, you should look into what type of material your mooring line is made with in order to get the best bang for your buck.

Polyester belongs to the group of polymers characterized by the presence of the ester functional group within each repeat unit of its main chain, making it a durable mooring rope material that stays strong under heavy loads and abrasion. It has a high melting point, low friction, and high elasticity, making it a versatile choice.

Polypropylene

Polypropylene, derived from propylene monomers consisting of three carbon atoms and six hydrogen atoms, is a multifaceted plastic. This is also elastic, but has lower temperature resistance and may not perform well under cycling loading.

Polyethylene

Ethylene molecules bonded in long chains make polyethylene, which is the most prevalent plastic globally. This mooring rope material is commonly used in small ropes for water sports like fishing and water-skiing.

This mooring line material is also called nylon, which is the most common used synthetic fiber with strong abrasion and temperature resistance. It is highly elastic, but loses around 10% of its strength when exposed to water.

Aramid Fibers

This material in a mooring line is resistant to melting or deformation at high temperatures, have low stretch but are strong, and can withstand significant tension before becoming fatigued.

High Modulus Polyethylene (HMPE)

With this mooring line material, it offers strength, low stretch, and minimal friction but may not perform well in high temperatures.

Liquid Crystal Polymer (LCP)

A mooring line made out of LCP shares these qualities but has better temperature resistance than HMPE and resists fatigue, abrasion, and deformation.

Different Uses of Mooring Lines

Proficiency in handling marine mooring ropes is crucial given the various mooring lines, enabling autonomous boat mooring in tranquil conditions. There are six types of lines you need to know how to tie, as well as find the right mooring line to use in those locations.

• Bow (head of the boat)
• Stern (back of the boat)
• Forward breast (near bow, pull in boat closer to you, keep close to dock)
• Aft breast (near stern, pull in boat closer to you, keep close to dock)
• Forward/Head spring (secures boat from back and forth near the bow)
• Back/aft spring (secures boat from back and forth near the stern)

How Many Dock Lines Should You Use?

To keep your boat secured at the dock, it is important to have bow and stern lines in place. Every boat, no matter the size, requires at least four dock lines, including one bow line and one stern line.

In some cases, two dock lines on each end of the boat will do the trick, as it will give you a piece of mind when parking your boat. These lines may be necessary depending on the dock and environmental conditions such as wind and currents.

To ensure smooth docking on either side while traveling, it is advisable to have two bow lines and two stern lines. Additional lines per side may be helpful for frequent travelers.

Taking Care of Your Mooring Lines

Mooring lines offer secure boat anchorage against external forces like wind and current. They are fixed attachment points between the moored boat and the shore or dock. The length of your boat rope will need to be checked periodically, in the event that your mooring line has been worn down.

When worn down, mooring lines can snap under pressure, endangering navigation and causing injuries or fatalities. Therefore, maintaining and replacing damaged lines promptly is crucial.

Mooring lines can still get damaged despite being sturdy. To ensure they can function as permanent dock lines, inspect them monthly for wear and tear. Replace any doubtful mooring lines immediately.

Chafing plagues most mooring lines, which results from repeated rubbing against hard surfaces or edges. To avoid chafe, use mooring lines carefully, avoiding sudden changes in line angle, and consider using chafe guards or abrasion-resistant guards.

To prevent further damage to mooring lines, avoid prolonged sunlight exposure and keep them away from heat sources, even if they are UV-resistant. Proper storage of your mooring lines is crucial for protecting ropes not only from the sun and heat but also from chemicals used on boats.

How Long Do Mooring Lines Last?

Rope lifespan is a popular meeting topic with no clear answer due to multiple variables that affect it. These variables include installation time, mooring hours, and regular visual inspections for damage, which some of these are typically out of the crew’s control. With proper experience, you can help increase the lifespan of ropes.

Replacing dock lines every three to five years is recommended for casual use, but depending on your setup and exposure to the elements these can change. Lines can deteriorate due to rain, mildew, and salt water, but regular cleaning can help extend their lifespan. However, lines may need to be replaced more often if you use your boat more and expose the lines to harsher conditions.

Type of Boat

The type of vessel determines the frequency of rope usage, the overall mooring arrangement design, cargo, and other factors. Boat length will affect how long of dock line you will need, causing you to use more and expose more dock line.

Design of Mooring Setup

Mooring arrangements can cause excessive rope abrasion if not designed properly, which highlights the importance of considering this factor during the vessel's design phase. Dock lines should not come in contact with other dock lines, as they will wear on each other.

Mooring Line Position

The unique mooring arrangement and frequent usage of spring or breast lines result in a shorter lifespan. So depending on where you put your dock line, it can affect how that particular line is used (stress, wear, and tear).

Boat’s Travel Span

The ropes of a vessel that has a longer sailing route will be used less frequently compared to those of a vessel with a shorter route. In other words, you could plan for longer trips to slow down the process of aging on your dock lines.

Setup at Ports

The condition of equipment and environment varies among ports, and poorly maintained equipment can potentially harm ropes. Furthermore, some ports utilize trucks to move ropes on the pier, leading to significant abrasion damage.

Storage and Environment

External factors such as weather, tide changes, wind, and the sun can all impact the lifespan of dock lines. In addition, improper storage of dock lines in dirty environments or constantly exposed to the elements when not being used will also affect the lifespan.

How to Prolong a Mooring Lines Lifespan

While some elements are out of the crew’s control, there are some actions you and your crew can take to help prolong the life of mooring lines. For ropes to last longer, it is vital to handle, install, and maintain them properly.

Crew members require in-depth training on manufacturer manuals and guidelines, and they should keep a watchful eye on mooring ropes. Regular inspections, on-board testing of residual rope strength, and close collaboration with the manufacturer are also essential.

Installation of Mooring Rope

For larger boat's that require an experienced crew, they must carry out installation following the manufacturer's instructions to avoid mistakes like incorrect drum winding and adding twists that weaken the rope, possibly causing it to break. A rotating platform can prevent twisting, while using two colors to mark the rope can aid in detecting any twists.

Routine Maintenance of Mooring Equipment

Maintaining mooring equipment is crucial to prevent fiber destruction on rough surfaces and sharp edges. Well-maintained Panama chocks are the most effective, whereas roller fairleads require more upkeep and can stop rolling. To enhance rope strength and lifespan, aim for a large D/d ratio, with OCIMF MEG4 recommending a minimum ratio of 15 for mooring fittings.

Treat Mooring Rope with Respect

To avoid damage, the crew should handle ropes carefully and adhere to the manufacturer's instructions. In addition, the crew should properly store all dock lines in a safe place away from the elements, chemicals, and direct sunlight.

Proper Usage

To ensure peak performance, use identical ropes in parallel positions. Different ropes can lead to unequal load sharing and reduce the lifespan of the rope with lower elongation. Length, diameter, mooring hours, construction, and design also impact this.

Further Protection of Ropes

Minimize rope damage with protective measures like a braided jacket covering the rope or purchasing separate chafe protection. These can greatly reduce the wear and tear of elements that are out of your control.

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I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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Rope test : Securely moored - these are the best mooring lines

Hauke Schmidt

 ·  07.11.2023

• to the test results
• How to make mooring lines last longer: tips against chafing

Although they are used practically every day, the mooring lines are easily forgotten. This may be because the crew is only concerned with them briefly when mooring and casting off. While a stubborn or worn-out genoa sheet comes to mind at every turn, the mooring lines at the bow and stern work and age almost under the radar.

The fate of the yacht depends on the lines for around a third of the year. In a typical northern European season, the ship is moored for around 160 days. On just 48 days - during the summer cruise and the night hours at weekends - at least the crew is on board.

Mooring lines put to the test: What the line has to do

Our last test in YACHT 13/2010 already showed that she shouldn't feel too safe. Above all, the enormous breaking load loss of the chafed lines was a warning to replace the mooring lines in good time. In the meantime, almost all manufacturers represented in Germany have brought new lines onto the market. An inspection revealed eleven new products from Gleistein, Lancelin, Maffioli, Marlow and Robline/Teufelberger, including six core-sheath constructions, two hollow braids and three squarelines. As a reference, we have added the Handy-Elastic from manufacturer Liros, which has been tried and tested for years and was rated well in the last test.

Most read articles

First and foremost, the rope must have sufficient strength to keep the yacht securely moored even in strong winds. It should also offer as much stretch as possible. The more energy the line can absorb by changing its length, the softer the boat jerks in the swell, which reduces the load on the cleats and makes it more comfortable to stay on board.

More about cordage:

• Making soft shackles from Dyneema yourself
• 3 methods for the targeted throwing of cordage
• Secure and stow ropes correctly

However, none of this will help if the cordage loses its fibre the first time it comes into contact with a rusty iron ring, a cleat or the concrete quay. Abrasion resistance is therefore also a decisive factor. Here in particular, we were keen to see the results of the new products. In the last test, dramatic losses in breaking load occurred even with moderate wear.

Ropes: What material are good mooring lines made of?

In addition, the rope should be as supple as possible, as it should be easy to cover and shoot up. Kinking is also undesirable. Slip lines that do not run out cleanly quickly put the crew in trouble in strong crosswinds.

In order to fulfil these requirements as well as possible, manufacturers have been working for years on the combination of rope construction and material. In principle, two plastics can be considered for mooring lines: polyester and polyamide, also known under the brand name nylon, are the most suitable materials. Polypropylene, which is also available, is very cheap, but is also much more sensitive to light and abrasion. It therefore ages very quickly and becomes hard, which is why we have not included polypropylene cordage. It should only be used as a yacht mooring line if the line absolutely has to be buoyant.

• Sailing knowledge ropes: everything about material, construction and use

We based the diameters on a virtual, ten metre long test yacht. A minimum breaking load of 3000 decanewtons was required, resulting in 14 millimetre thick lines. Only the flat mooring from Robline did not meet this specification according to the catalogue, but was nevertheless supplied in 14 millimetres. And rightly so - in the test, we determined an average breaking load of around 4600 decanewtons, a good 60 per cent above the manufacturer's specification and more than sufficient.

What breaking load and working load mean for lines - Differences

Pleasingly, none of the lines undercut the manufacturer's specification by more than 18 per cent, and as a rule the ropes were even able to withstand significantly higher forces. The largest downward deviation occurred with the ETS from Lancelin. However, with its 4077 decanewtons, the line is still very suitable for the test boat. The Maxidock from Maffioli lives up to its name, with more than 5600 decanewtons it has the highest breaking load in the test.

In practice, the breaking load of a mooring line only plays an indirect role; the working load is derived from it. According to the recommendations of the classification society DNV GL, it should not exceed 20 per cent of the breaking load, which corresponds to values between 735 and 1128 decanewtons for the test candidates. Higher working loads offer scope for mechanical damage to the rope.

To test the abrasion resistance, we chafed all the lines under exactly the same conditions as in the last test and then determined the breaking load of the damaged rope.

This cordage was convincing in the abrasion test

Lancelin's polyester Squareline exhibited the least damage, with just under 60 per cent of its original strength remaining. The worst performers were the Handy-Elastic from Liros and the Dock Twin from Gleistein, which lost 60 and 55 per cent of their breaking load respectively. Only the Maxidock from Maffioli still achieved the required breaking load or working load for our test boat after the abrasion test. The line only loses 44 per cent of its strength and has the necessary reserves thanks to its high breaking load.

The choice of material, i.e. polyester or polyamide, plays practically no role in the abrasion resistance, both plastics are roughly on a par. And there is also no clear picture when it comes to construction. Depending on the manufacturer, core-shell braids, hollow braids and squarelines sometimes perform better, sometimes worse.

One thing is particularly striking: the appearance is deceptive. The Handy-Elastic, which appears almost intact at first glance, lost 60 percent of its breaking load, so a lot of fibres must have been damaged, while the visually significantly impaired Maxidock only lost 44 percent.

How much can the tested mooring lines be stretched?

Ropes made of polyamide have a clear advantage in the elongation measurement, offering up to three times more stretch than polyester ropes. These differences were already apparent during the testing. While the polyester ropes could be pulled up to the breaking point in a single operation without any problems after the obligatory pre-tensioning, the polyamide products did not have enough travel for the tensile testing machine - it was so prolonged that we had to interrupt every tensile test and re-tension some of the batches several times. The nylon squareline from Robline has the highest elongation, it stretches by around 15 per cent under working load and also achieves the best values with our comparative load of 600 decanewtons. At the other end of the scale are the Amarre from Lancelin and the Blue Ocean from Marlow with 3.8 and 4.6 per cent respectively.

• to the measured values

The low stretch of the Blue Ocean is due to the material; it is a rope made from recycled PET, i.e. polyester, which is obtained from empty drinks bottles. However, the poor performance of the Amarre is surprising. Its core is made of polyamide, so the rope should actually stretch a lot. Apparently, the relatively compact polyester sheath limits the stretch, which makes the rope behave like a pure polyester product.

If you have such lines on board, you have to reckon with hard jerks in swell. In any case, it is advisable to retrofit shock absorbers. Of course, both a stretchable rope and an additional rubber buffer in rough harbours would be ideal. The elongation values make polyamide rope the predestined mooring line, but this is countered by another material property: polyamide absorbs water, with the result that the fibres shrink. In practice, this means that The lines can become stiff and unwieldy after a short time.

The differences in the spliceability of the mooring lines

Whipped ropes harden particularly quickly; core-sheath braids and squarelines, on the other hand, are much less critical. Modern polyamide ropes therefore retain their suppleness for many years. To accelerate ageing, we stored the polyamide samples in a 65-degree water bath for five days. This stress test made the lines slightly stiffer, but there were no significant differences between the products.

The hollow braids and squarelines nestle best around cleats and bollards. However, they also tend to pull individual fibres out of the construction on rough surfaces. The flat mooring and the long braided squareline from Lancelin seem particularly susceptible. The core-sheath constructions also feel good in the hand and are easy to shoot. Only the Amarre from Lancelin is slightly less supple and tends to kink.

When it comes to spliceability, there are basically only the design-related differences. Hollow braids are the easiest to work with. Some practice is required to keep track of the square lines, only core-sheath constructions require more effort. In order to maintain the breaking load, both the core and the cover must be spliced together.

Quality pays off: the decision to buy ropes should not be a question of price

If you remember how long the ship hangs unattended on the mooring lines, it becomes clear that no compromises should be made when deciding on ropes. The outstanding stretch makes polyamide lines the first choice. They not only ensure relaxed nights on board, but also protect the fittings. As a rule, they offer higher breaking loads, which provides greater safety reserves in the event of damage. If they harden after a few years, it is better to replace them. Polyester ropes, on the other hand, remain supple, but are also low-stretch and therefore less suitable.

Considering the enormous loss of strength that comes with damage to the lines, the mooring lines should be replaced anyway whenever there is recognisable damage. With very good elongation and good wear resistance, the nylon squareline from Robline secured the test victory, closely followed by the Maffioli Maxidock as the best core-sheath braid. The ETS from Lancelin is also in the top three; as it is one of the cheapest lines, it also receives the price-performance tip. Those who have matured to Dock Twin, Handy-Elastic or Palma Elastic won't make a bad choice either. The polyester mooring lines perform worse across the board. The Squareline from Lancelin is the best performer. The Blue Ocean can at best score points with its environmental aspect.

The test results at a glance: these are the best mooring lines

Best boat rope – the right rope for mooring lines, halyards and sheets

• February 23, 2021

Choosing the right boat rope for the job depends on what you want it to do, says Rupert Holmes. Here's a quick guide to marine rope and its uses

At this time of year we often start to put into place plans for upgrading our boats for the new season. In many cases this will involve at least some work on replacing or improving running rigging, but it’s not always easy to identify the best type of boat rope for each function. Fortunately, in the case of marine rope the best kit for a specific task is rarely the most expensive.

Mooring lines, for example, benefit from being stretchy, as this reduces uncomfortable snatching in rough conditions. Nylon has plenty of stretch so is ideal for the purpose and is why it’s used for anchor rodes and as a snubber when anchoring with all chain.

Nylon has historically been one of the cheapest materials available for rope, arguably aside from polypropylene. The few boat owners who opt for polypropylene mooring warps invariably find its propensity to degrade quickly in ultra-violet light mean it’s more expensive in the long term. A faded and whiskery polypropylene rope has only a fraction of its original strength.

Of late nylon has become progressively more expensive, so dock lines are now more frequently made of polyester, often using a construction that enables the line to stretch. This is a fundamentally different approach to polyester rope intended for use as halyards and sheets, which are engineered to minimise stretch.

What’s the right diameter?

For sheets and halyards, it’s easy to assume that a chunky line made from a relatively inexpensive material is the perfect robust option for a cruising yacht. However, there are a number of problems with this approach and all too often I see people struggling to do what ought to be simple operations because of an inappropriate choice of rope.

Marlow’s Blue Ocean Dockline is a polyester product made from recycled plastic bottles. It has the same material properties as standard polyester rope. Photo: Marlow Ropes

• Buy Marlow Blue Ocean Dockline on Amazon

Firstly, above 8mm diameter the thicker the line the more difficult it is to handle – there’s more bulk to coil, flake or stow. Increasing line size will also increase friction, which can be compounded by the   low-grade blocks and other deck fittings with which cruising yachts are often equipped.

Marlow Blue Ocean Dock Line deals

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Oversized lines for anything other than mooring are therefore usually a route to an unbearable amount of friction. By contrast, reducing the size of lines tends to reduce friction. But won’t that make them weaker? Not necessarily – 8mm Dyneema is typically just as strong as 10mm double-braid polyester. In any case most lines fail through chafe and, of course, one that’s subject to less friction is less likely to chafe.

In addition, Dyneema has a slippery surface that’s intrinsically resistant to chafe. Granted the smaller Dyneema line will be more expensive than a double-braid polyester one a size larger, but possibly by as little as 25%, making gaining the advantages of Dyneema more affordable than it might appear at first.

Article continues below…

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Maintenance of your rigging can save expensive failures and could be a lifesaver - here's how to check your boat's…

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Find out how to thicken and sheath ropes to stop them slipping in a clutch in this extract from Splicing…

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Make sure the new season runs smoothly with these tips from Barton Marine

Is stretch really that much of a problem for cruising yachts? Yes – even if you don’t want to break any speed records it impacts the handling of a boat. In a gust you want the sails to be as flat as possible, but what happens when halyards stretch is that the sail shape becomes deeper. This produces even more power, so the boat heels more than necessary and starts to round up into the wind, making it difficult to steer.

When replacing lines it’s always worth taking a critical look at the associated hardware. If the mainsheet, for instance, has reached the end of its life, the blocks may not be far behind and if you are replacing a line with a higher tech option with less stretch the inevitable higher shock loads will often bring forward the point at which a worn-out fitting fails.

The cams of clutches wear over time, so may need attention even if they have held the old rope (with a rough cover) securely. Often the first time an owner realises the extent to which clutches are worn is when a shiny new rope slips. Fortunately, most manufacturers sell replacement cams, even for very old models, at a small fraction of the cost of a new clutch.

Extra jackets

If a line tends to slip even when the cams of the clutch have been replaced the best option is to splice an additional length of outer jacket around the line where it’s held in the clutch. This increases thickness locally, making it easy for the clutch to do its job. If the jacket is made of a material such as Technora it will also increase friction at the clutch, which again helps to prevent slip.  

Dyneema chafe jacket is extremely effective at preventing chafe at masthead sheaves. The primary mechanism for this is that the material is intrinsically slippery, but it also provides an additional physical barrier before any chafe reaches the structural core of the rope.

Don’t underestimate the effectiveness of this – I’ve seen halyards with Dyneema protection looking almost like new at the end of an Atlantic crossing.  

End for ending

It’s an easy maintenance task to forget, but end-for-ending can double the lifespan of a line. Simply mousing it out and reinstalling the other way round will give a fresh bit of rope at all the chafe points, effectively doubling its service life. If you have to cut a splice off, a Selden halyard knot will suffice as an easy alternative to splicing an eye on old rope.

More about splicing…

• Learn how to do a Dyneema eye-splice
• A braid end-to-end splice is useful when you want to create an endless loop
• Here’s how to do a soft eye splice
• A V-bridle is a very secure way of spreading the load on the bow or stern when towing or mooring

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