Using dock lines for anchor bridle

[valhalla360]

Originally Posted by Muaddib1116

A prusik has two tails right? Did you split them and have one tail go to each hull? How does a prusik hold when only one tail is loaded at a time? I was thinking of trying a prusik on my monohull and tie the prusik in the middle of the line and have each tail go to the port and starboard bow cleats like a bridle, but I couldn't find any info on what happens when the knot is only loaded from one tail.

Now you are going to make me question if I'm calling it the right name.

I form a loop in the middle pass the loop around the rode a couple times and then pull the two tails thru the loop. Then one end to each bow.

Never had it slip and I've attached it to chain and rope rode.

[Mike OReilly]

Originally Posted by valhalla360

Now you are going to make me question if I'm calling it the right name.

I form a loop in the middle pass the loop around the rode a couple times and then pull the two tails thru the loop. Then one end to each bow.

Never had it slip and I've attached it to chain and rope rode.

Ok, this makes sense. Seems a tad more awkward than rolling hitches. You’ve got to tail 30+ feet X 2 of line (my snubbers are 40’ each), whereas with rolling hitches I just have to manage about 3’ of line. But I get how it works now.

[valhalla360]

Originally Posted by Mike OReilly

Ok, this makes sense. Seems a tad more awkward than rolling hitches. You’ve got to tail 30+ feet X 2 of line (my snubbers are 40’ each), whereas with rolling hitches I just have to manage about 3’ of line. But I get how it works now.

Maybe I'm describing it wrong. It takes maybe 10 seconds to tie and with the large deck to work on, it's not awkward. Never tried it on a narrow monohull bow, so it might be more awkward there.

Sort of like this except, I don't tie the tails together:
https://www.animatedknots.com/prusik-knot

The tails only get pulled thru as the final step (not 2-3 times).

[Shrew]

Originally Posted by thinwater

Sewn climbing slings will be the cheapest, easiest, and hold best for your size boat. Replace when it shows wear. The simplest way to attach them to the bridle is with a pair of wire gate climbing carabiners, gates reversed and opposed. (wire gate carabiners don't corrode up, and they are reversed and opposed because they do not lock).


No thimble needed in this application (no abrasive surfaces and the twin carabiners provide a good bearing surface).

I hate this idea. Wire gate carabiners have the lowest load rating. At least a locking carabiner can hold the carabiner together. On a wire gate, all you have is the wire and carabiner shaped like a C with a load limit of around 3,000 pounds. Even 1/2 line is around 8,600 lbs.

Also, webbing is static.

[GreenWave]

Originally Posted by valhalla360

Now you are going to make me question if I'm calling it the right name.

I form a loop in the middle pass the loop around the rode a couple times and then pull the two tails thru the loop. Then one end to each bow.

Never had it slip and I've attached it to chain and rope rode.

ok so you take the two tails from the prusik (which normally for clmbing would be knotted to getehr to form a closed loop) and tie them to the cleats using a cleat hitch of some sort?


There is also a prusik handcuff knot which renders two loops that could be clipped etc.

[valhalla360]

Originally Posted by GreenWave

ok so you take the two tails from the prusik (which normally for clmbing would be knotted to getehr to form a closed loop) and tie them to the cleats using a cleat hitch of some sort?

Yes, cleat off the tails to the cleats on each bow.

[fxykty]

Originally Posted by Shrew

I hate this idea. Wire gate carabiners have the lowest load rating. At least a locking carabiner can hold the carabiner together. On a wire gate, all you have is the wire and carabiner shaped like a C with a load limit of around 3,000 pounds. Even 1/2 line is around 8,600 lbs.



Also, webbing is static.

We use this method and parts, except use a soft shackle rather than hard carabiners. But I think you’re making a couple of mistakes.

The wire gate carabiners, like all climbing gear, are rated minimum 20kN - effectively breaking strength. Wire gate, locking, whatever, it doesn’t matter, all are rated at least 20kN and some up to 27kN. Using two non locking carabiners with gates opposed is a standard climbing practice when a locking carabiner isn’t available. And by using two you’ve doubled the strength so it’s more than sufficient.

The webbing loop is just to attach to the chain, the shackle/carabiners then connect the loop to the bridle eyes. We use narrow Dyneema webbing that we buy from climbing shops as it’s cheaper than making loops out of Dyneema ourselves, and fits through chain links much easier than a soft shackle.

[Muaddib1116]

Originally Posted by valhalla360

Yes, cleat off the tails to the cleats on each bow.

So you've never had an issue with the knot when the tails ate being loaded one at a time instead of simultaneously? Like if the the boat is sailing back and forth? Normally the tails of a prusik ate loaded together, since it is usually a closed loop. I like the idea of a knot based snubber for days when I don't want to deal with my mantus hook, but I still want to tie to both bow cleats, bridle style.

[rslifkin]

I frequently use dock lines as a snubber. It's surprisingly quick to use the spliced eye for a prusik even with needing to pull 30 feet of line through. If wanting a bridle, I use 2 separate lines attached next to each other on the chain.

[Mike OReilly]

Originally Posted by valhalla360

Maybe I'm describing it wrong. It takes maybe 10 seconds to tie and with the large deck to work on, it's not awkward. Never tried it on a narrow monohull bow, so it might be more awkward there.

Sort of like this except, I don't tie the tails together:
https://www.animatedknots.com/prusik-knot

The tails only get pulled thru as the final step (not 2-3 times).

Thanks. I appreciate the explanation Val. I think I get it. I would still have to tail 20 to 30 feet of line X 2 wouldn't I? Probably not a big deal, but rolling hitches still seem easier to me, but I can see how it would work. Thanks.

[rgleason]

It is also caused by wind surge too, in addition to yawing.

[Muaddib1116]

Is there a guide anywhere for what size line will hold on various size chains? What's the biggest line diameter that a rolling/camel hitch will hold on 3/8"/10mm chain?