What is the right knot

[midnight1957]

I know this is a dumb question but I am going to ask it anyway. When I tie my pontoon up to my dock I usually just use a couple of half hitches but at times that doesn't work so good sometimes. I know there is a correct knot or way to tie up to the cleats and I was wondering if someone had a picture with instructions of how to do it?
Also I have used nylon rope this past year and it has broken 2 times this year almost loosing my pontoon in the lake. What is the correct rope to use, is it something special?
Thanks for your help,
Wade

[badmoonrising]

I use a cleat hitch, then with the remaining end of the rope, a half hitch:
http://www.netknots.com/rope_knots/

I always use 1/2 inch mooring lines, never had a problem.

[Texoma Toon]

+1

[Bamby]

Are you sure you're actually using nylon. Nylon is actually the best choice for dock line but at least around here anyway a lot of boaters utilize bits of polypropylene probably because it's cheap. Polypropylene has it's uses but not as dock line.

From BoatUS

Dock-Lines

When you decide to purchase dock lines, it is possible to be overwhelmed by the variety of rope available. If you are after rope to secure your boat to the dock, you can--and should--ignore most of those spools. Most marine cordage is for general or specialized use aboard sailboats, and the less it stretches, the more it is revered by sailors. For dock lines, however, sailors and powerboaters alike need a rope that does stretch.
Nylon only

In pursuit of dock lines that do not stiffen with age, some rope manufacturers have in recent years begun offering pre-spliced dock lines made from "stretchy" polyester. These may be good for large boats in protected marinas, but for tying your boat to whatever dock, slip, pier, or seawall you might encounter, you should skip right over all rope labeled polyester or Dacron or Kevlar or Spectra or any other fancy name. The right rope for dock lines is plain old nylon.

Nylon has three characteristics that make it ideal for dock lines. It is incredibly strong, it is very stretchy, and it resists the harmful effects of sunlight better than any of those fancy-name synthetics.

The value of strength is self-evident, but the benefits of elasticity may not be as obvious. When your boat surges against an unyielding dock line, the load on the line goes from zero to the maximum at the instant the line comes taut. The likely consequence is a broken line--not unlike how you might snap a piece of thread with a jerk. Even if the rope is strong enough not to break, it is hammering cleats and bitts with every surge. Nylon doesn't come taut suddenly, but dissipates the load by stretching. It is like the difference between hitting the steering wheel or hitting the air bag.

As for nylon's resistance to ultraviolet damage, dock lines--particularly permanent dock lines--live in the sun. Nylon lines enjoy a much longer life than other lines in that environment.

Nylon actually has a fourth appealing characteristic that you will surely appreciate: it is less expensive. The only exception is polypropylene.

What about polypropylene?

Polypropylene rope is stiff, very slick, and usually bright yellow, but its most distinguishing characteristic is that it floats. You will be familiar with this rope if you water ski. Polypropylene has a relatively low breaking strength, the quality of the rope is notoriously erratic, and because it is so slick, it does not hold a splice. Nevertheless, some boaters use polypropylene rope for dock lines, presumably because it is cheap. This is false economy. Polypropylene suffers badly in sunlight, losing much of its strength in as little as a year. Leave polypropylene to the skiers.

Braid or Three-strand?

Nylon rope is available in both braided and three-strand twist construction. Each has its advantages.

Braided line looks "dressy." It has better abrasion resistance than three-strand, and typically it is slightly stronger. Braided line can be a good choice for tying up in your home dock, but because braided lines have a tendency to snag on rough pilings, I don't like braid for traveling dock lines. (As anchor line, however, braided nylon handles easier and stows more compactly and with less of a tendency to tangle, but at the cost of some elasticity.)

The main advantages of three-strand nylon for dock lines are that it doesn't snag, it is easy to splice, and it is considerably less costly than braided rope. Three-strand also has the significant advantage of being stretchier than braid. As a practical choice for dock lines, three-strand nylon is unbeatable. How often is the best also the least expensive?

What size?

Since larger diameter line takes longer to chafe through, a case might be made for selecting the largest diameter that will fit your cleats. But as the line diameter gets larger, it also becomes less elastic--making the "right" line diameter a bit of a Catch-22. The line diameters shown in the chart (See Original Link) should deliver both sufficient strength and the beneficial effects of elasticity.

What length?

For dock lines that are a fixture of your permanent slip, work out the appropriate lengths using old line or light stuff (flag halyard)--making allowances for eye splices--then make up your new lines to those lengths. Nothing is more convenient than pulling into your slip and simply dropping eyes over the mooring cleats. If your dock is fixed--not floating--be sure to leave a little extra length for unusually high or low tides.

For a set of dock lines that travel with the boat, I like lines equal to the length of the boat. It is essential for spring lines to be this long. You can get away with shorter bow and stern lines, but I don't like to sort through my dock lines to place a short one here and a long one there. In a rush, I can grab the one on top and know that it will be long enough. The inconvenience of a line that is too long is far less than one that is too short.

Eye splice

All dock lines should have an eye splice in one end. For permanent dock lines, the eye will be in the boat end of the line, and it should be just large enough to fit over the horns of the boat's mooring cleats. A small eye will be unlikely to come loose, but for complete security you can feed the eye under an open-based cleat before looping it back over the horns.

The eye on transient dock lines generally goes ashore so you can adjust the lie of the boat from on board. Twelve inches is a good eye size, making it easy to pull the line through the eye to form a loop.

A knot, by the way, is a poor substitute for a proper splice. A bowline, for example, reduces the breaking strength of a line by about 40% while a splice retains 95% of the rope's strength.

Chafe protection

Dock line failures are almost always a result of chafe. Unfortunately, it is nearly impossible to rig dock lines so that they never rub against the dock or the boat. Protect your investment--the dock lines and the boat--by sliding a foot or two of heavy-duty hose over each line and tying it in position to take the abrasion.

[playcat]

Nylon is great for dock lines because it stretches, almost 30% of its length. This acts like a shock absorber and gives a clear indication of when a nylon line is under heavy strain.
Nylon's enemy is sunlight, but polypro is even worse. Replace any synthetic rope when it starts to become stiff or brittle. That is a clear indication of UV damage.
Even though your toon is much lighter than an equal sized fiberglass boat, dock line should be 1/2 inch diameter as a minimum. If your cleats can't handle that size rope, you need bigger cleats!

[lazyriver]

This has been very informative! This newbie has been wondering about what rope & knots to use.

Thanks!

[midnight1957]

Thanks guys, you always come through for me.

Wade

[jafo9]

i use an app on my phone called "knot guide". however, you can get by with only knowledge of a few knots. bowline, mooring hitch and a cleat tie are probably the most common. a bowline is probably one of the most useful knots on and off the water. i got my land cruiser stuck a few weeks ago at the lake just horsing around and i used a 4 person tube tow rope with 2 bowline knots to tie my car to the tractor pulling me out. even after pulling me out, the knots easily came out of the rope.

[Bamaman]

I take a 50' bag of polyprop. hollow rope and cut it into 4ths. Then, I'll make a loop on each end of the 4 ropes and weave it into the hollow part of rope--making eyes on each end of each rope.

I then loop the end of each rope through the cleat. If I need more rope, I'll loop another section of rope through itself. (Kind'a hard to put into words.)

I'll carry 6 or 8 sections of rope with loops on each end in my boat.

If I was not going to be around while the boat was tied up in the water, I'd probably use a heavier rope. Since we have a boathouse, I cannot remember leaving my boat in the water overnight in many years.

[landlockedsailor]

Here's a GREAT website for knots. Best I've seen among the many out there.

http://www.animatedknots.com/cleatdeck/index.php?