Three Strand Nylon
Diameter
Note that JS's chart does not mention all chain anchoring. That is one of the advantages to chain. It has its own kind of stretch as it lifts with the waves and wind off the bottom, softening the pull. If you are concerned for a big blow, you could think about adding a kellet and/or paying out more scope. 4:1 chain should be good for most conditions, but 5:1 scope should allow you to sleep like a land lubber. -Will
Similar to the above with all 5/16" chain, I use the small Mantus on our 33' boat; but, decided that the Mantus chain hook was just to darn ungainly making it potentially dangerous for our use. I replaced it with the Mantus Snubber Pendant and connect it to the bridle thimble with a 3/8" dyneema soft shackle. If ever needed I will cut the soft shackle and retrieve the bridle much quicker than trying to take the chain hook off.
Hello Below said: Similar to the above with all 5/16" chain, I use the small Mantus on our 33' boat; but, decided that the Mantus chain hook was just to darn ungainly making it potentially dangerous for our use. I replaced it with the Mantus Snubber Pendant and connect it to the bridle thimble with a 3/8" dyneema soft shackle. If ever needed I will cut the soft shackle and retrieve the bridle much quicker than trying to take the chain hook off. Click to expand
Hello Below said: If ever needed I will cut the soft shackle Click to expand
We bought a Davis Shockle snubber that works really well
Thanks all, I just ordered a bridle from 48 North that was on sale and more reasonably priced that the mantus version. I have a second mantus chain hook that I will attach to this. Will still use my 5 ft long bridle since it is so easy to use but this 18 ft long bridle will be handy if the winds pick up beyond 20 or 25 knots. Anchor Snubbers, Anchor Bridles, Mooring Lines | 48° North Marine bob
Cat 310 #1 in GA said: Thanks all, I just ordered a bridle from 48 North that was on sale and more reasonably priced that the mantus version. I have a second mantus chain hook that I will attach to this. Will still use my 5 ft long bridle since it is so easy to use but this 18 ft long bridle will be handy if the winds pick up beyond 20 or 25 knots. Anchor Snubbers, Anchor Bridles, Mooring Lines | 48° North Marine bob Click to expand
The Devil is in the Details. Cost of a 26' Bridle, 5/8ths 3 strand line designed for a 30-40ft boat. Mantus through Fisheries $204 appears to be free shipping 48ºNorth Marine. $200 shipping $29... I love to see a NW company engaged in the marine marketing business. They have been engaged since 2018 and appear to have a focused business plan providing a USA made product at a fair price. You may be able to get more variety of items, i.e. shorter lengths or smaller diameter lines. Delivered costs appear to be pretty close when doing an Apple to Apple comparison. It appears to be a skipper's choice (as always). I would encourage you to get at a minimum 5/8 3 strand. It has a Rope Breaking Strength 12,200 lb. Check the hardware that comes with the bridle to assure it has adequate strength. I note that the 48º North product comes with a 1/2" SS shackle. Is the pin captured? If not get a couple replacements. You will be dropping the pin overboard one night when you are attaching the bridle. It will not be the time to chastise your failure to have a spare. You may also consider a soft shackle made of dyneema, as a back up when the shackle chooses to go swimming.
If saving money is the goal, I would encourage you to learn the seaman's art of ropes. Learn to buy rope in bulk at warehouse pricing. Sometimes buying cut ends in the over cut bin are half price or less. Same rope just in a length the seller can not retail. Then make your own splice. Whipped ends, or eye loop to the desired length. These skills last a lifetime. You'll be able to help many a new boater and pass along this skill as it has traditionally been done sailor to sailor drinking Rum or Beer.
I've never understood the desire for a bridle if they aren't tying up to a mooring or have a bowsprit. With my spring off to one side of the bow in a chock, the boat swings a bit off center and therefore has less tendency to sail. You can Also set up a lee for boarding the boat from the dinghy, or the reverse. We used a 25 to 35' snub, with a thimble and eye splice, and a suitable galvanized chain hook. Nothing fancy, but with unlimited strength in terms of the weight of my boat in anything less than hurricane strength winds and a good 6' sea. After that, there are no set rules. Mine is as many anchors as I have, deployed.
tfox2069 said: I really like that 48 North lets you pick from a wide range of lengths for your bridle. The prices are excellent too. Thanks for posting. I wasn't aware of them. Click to expand
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Probably more information than you ever wanted to know about anchor snubbers and bridles
The anchor snubber and bridle size calculator below is designed to provide directional estimates for optimal snubber line diameter and length for 3-strand nylon. The results indicate the diameter and length of line required to absorb the kinetic energy of the boat for the weight and speed provided.
The calculator uses the formula for kinetic energy, KE = 1/2 Mass X Velocity 2 , to calculate the energy generated by the boat.
The capacity of the snubber or bridle to absorb the kinetic energy of the boat is calculated using the elastic potential energy formula PE = 1/2 kx 2 where k is the spring constant and x is the displacement. The spring constant is calculated using Hook's law k = F/x, where F is the force needed to extend the spring and x is the displacement length. We use 10% elongation at 20% minimum break strength to determine displacement.
The following deductions in strength are built into the calculator: 1. When wet, nylon's strength is reduced ~12% 2. Splicing reduces nylon's strength ~10% 3. Hard (or thimbled) eye reduces nylon's strength ~20%
Snubber type.
Single line snubber or double-line bridle.
Boat length overall (LOA) is used in the Drew Frye calculation.
Weight of vessel fully loaded: fuel, water, gear, black water, crew, etc
This is the boat's speed at anchor, not wind speed . To calculate the kinetic energy of the boat, the speed in knots is required. A boat's speed at anchor is difficult to measure but here are some generally accepted values used in various articles:
The generally accepted range for the WLL% of 3-strand nylon rope is 10% - 20%. The calculator uses 12% as the default. Please feel free to use your own value.
Terms of Use
In using this calculator, you, the user, understands and accepts the limitations of the information provided:
Limits of Liability
To the maximum extent permitted by applicable law, snubberhead.com and 48 Degrees North, LLC shall not be liable for any direct, indirect, incidental, special, consequential or punitive damages, loss of vessel(s), property damage or personal injury to the user or others, whether incurred directly or indirectly, from the use of the calculator service. THE AGGREGATE MAXIMUM LIABILITY OF SNUBBERHEAD.COM AND 48 DEGREES NORTH, LLC ENTITIES SHALL NOT EXCEED TEN U.S. DOLLARS ($10.00 USD) FOR ANY CLAIM. The limitation shall apply to any liability, whether based on warranty, contract, statute, tort - including negligence - or otherwise, and whether or not snubberhead.com and 48 Degrees North, LLC have been informed of the possibility of any such damage and, and even if a remedy is set forth herein is found to have failed.
Swivels are used to attach an anchor to the chain with the purpose of preventing chain twisting as the boat moves around in the anchorage. Swivels also help the anchor come up in the correct orientation into the bow roller on retrieval.
One issue is swivels often fit directly into the shank and if so can be side loaded (when the anchor is stuck in rocks for example) and fail at much lower loads than the SWL they are rated for. To solve this attach a shackle or a shackle with some chain to the anchor first and then the swivel this will prevent the above mentioned problem with side loading. Further it is often hard to size a swivel for to match the strength of the HI TEST chain, though some well-designed products are available on the market.
One should pay attention to the SWL (safe working load) rating on the swivel as compared to the chain.
Snubbers/Bridles:
Why Use an Anchor Bridle/Snubber System?
So more simply said the bridle ensures that you anchor has the highest chance of staying put and your boat staying intact.
There are different ways of attaching the bridle to your chain:
Mantus hook
Mantus Bridle Line Sizing Recommendations:
The role of the bridle/snubber system is to be able to absorb the shock loads by stretching and yet be strong enough not to fail when exposed to these high loads conditions. Thus we make sizing recommendations keeping this in mind.
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| 5/8 | 3/4 | 1 |
| 25 | 30 | 34 |
Effort should be made to protect snubber/bridle line from chafe and inspect it for wear regularly.
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Base diameter is 11 inches. Buy Now. CALL US WITH ANY QUESTIONS: WITHIN THE US: 1-855-262-6887. BEYOND THE US: 469-226-3468 / 469-878-4083. Download the Mantus Catalog. Download the Mantus Catalog. Get maximum shock absorption when anchoring or mooring your boat with Mantus anchor bridles. Our bridles keep your boat secure when anchored or moored.
Small Bridle System for 30 - 40 ft Boats - no Chain Hook. SKU: 447338 Item ID: MNT MANBRIDLEUNI-S. Designed for use on monohulls. Reduces shock loads. Large rope eyes. Typical Vessel Length: 30 - 40 ft. Your Price: $180.50 / Each.
An anchor snubber is an elastic line that attaches to a boat's anchor chain on one end and mooring hardware on the deck at the other. An anchor bridle is a snubber with two lines. The snubber or bridle works like a shock absorber in the all-chain ground tackle system.
An anchor snubber typically consists of a line (or two lines in the case of a snubber bridle) spliced to a chain hook that attaches to the anchor chain while the opposite end is fixed to mooring hardware on the deck. Anchor snubbers are used on boats with all-chain anchor rodes to absorb the energy generated from a boat's motion at anchor.
Chain with a 6 foot 1/2 inch three strand nylon snubber - 3,249 lbs. Working Load Limmit for 5/16 Grade 30 Chain 1900 lbs, Breaking Strength 7600 lbs. -62% reduction in peak loads or about 1/3 of the ABYC worst case with the use if 30 foot bridle. -Only 22% reduction in peak loads with the use of the 6 foot snubber.
When we got this boat, I didn't even know that these things existed. I'm not 100% sure what the official name is but in this video, I'll attempt to show what...
Anchor bridles reduce strain on the chain rode by attaching to cleats or eye bolts, designed for higher load amounts, and takes a significant amount of force off the windlass when the anchor is set; the relaxed anchor line also slows wear and tear on your entire anchoring rig. Whether mooring or setting anchor, anchor bridles help silence the noise of chain ride on your boat by effectively ...
Universal Mooring Bridle/Snubber System. Model # P017750902. $251.99 - $427.99. Select a Product. 5/8" X 28' Universal Small Anchor, Mooring Bridle System 3/4" X 29' Universal Medium Anchor, Mooring Bridle System 1" X 34" Universal Large Anchor, Mooring Bridle System. -.
Introducing the Mantus Anchor Bridle and Snubber System: Buy Now! FREQUENTLY ASKED QUESTIONS. Strong and Durable. Designed to absorb the shock load from wind gusts and waves. Employs chafe protection to all areas exposed to rubbing. Uses heavy duty 316L stainless steel thimbles. Mantus Chain Hook/Grabber sized for your chain.
The bridle creates an artificial bow, spreading the weight between the hulls and moves the centre of effort forward to reduce the swinging while on the anchor. Hang lines over the bow. Put the hook over a complete chain link and ensure the pin has snapped back into place. Drop chain 5 or 6 metres. Ensure it is at a nice tight triangular angle.
There are many reasons to consider a double-line anchor bridle over a single-line anchor snubber: - Vessel size - boats over approx 60,000 lbs are usually power boats and most in this size have significant wind profiles. The drag load generated from high freeboard, cabin-top and superstructure coupled with the vessel weight can generate a ...
Wanted to share a few pics of my new DIY snubber set up. I wanted a bridle so I can anchor from the stern in modest weather. I can get more air into the cabin that way. And there has been talk on the forum lately about the value of snubbers so... Anyway, If nothing else, the bumpers will act as floats near the boat and keep the line visible.
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The bridle helps to stabilize the boat by spreading the load across both hulls, preventing uneven strain and protecting the anchor chain from rubbing against the hull. Incorporating a snubber or bridle into your anchoring routine ensures a safer and more comfortable experience, regardless of weather conditions.
It is a good option for weekenders and fair-weather folks. Anchor Bridle - Essentially 2 independent line snubbers shackled to a common chain hook. These are ideal for cruisers, large vessels (> 30 gt) and those with a reasonably good chance of getting caught in a serious blow. 2 independent lines provide redundancy and some additional strength.
Attach the eyes of the bridle arms to the bow cleats making sure the arms are on the outside of the bow rail. Let out rode slowly to pass the pendent and thimble back through the anchor roller bail. Let out more rode until the bridle takes the strain off of the rode and there is slack in the rode. To retrieve the bridle, simply reverse the ...
449. Catalina 310 St. Simons Island, GA. Dec 15, 2022. #1. Wondering what people use for an anchor bridle for the 310 with all chain anchoring? I have a one-piece Y shaped braided bridle that is 5 ft long with a mantus chain hook that I have used for a few years with good success.
The anchor snubber and bridle size calculator below is designed to provide directional estimates for optimal snubber line diameter and length for 3-strand nylon. The results indicate the diameter and length of line required to absorb the kinetic energy of the boat for the weight and speed provided. The top-half of the cell represents the load ...
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WITHIN THE US: Toll free 1-855-262-6887. BEYOND THE US: 469-878-4083. 469-226-3468. Visit our storefront: 8820 Frey Rd, Houston Texas 77034. Get maximum shock absorption when anchoring or mooring your boat with Mantus anchor bridles. Our bridles keep your boat secure when anchored or moored.
Swivels, Snubbers & Bridles - Mantus Marine. Swivels: Swivels are used to attach an anchor to the chain with the purpose of preventing chain twisting as the boat moves around in the anchorage. Swivels also help the anchor come up in the correct orientation into the bow roller on retrieval. In the practical sense swivels are often unnecessary ...
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