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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Anchor Set Up
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Thread: Anchor Set Up Reply to Thread
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Topic Review (Newest First)
08-11-2009 10:32 AM
redcobra My boat weighs 18000 also and I only use 6' of chain and the rest is 5/8" nylon with a 35lb Danforth Hi-Tensile. Never had a problem on the Chesapeake. Been in 30+ knots with a 7:1 scope and no issues. Why so much chain?
08-11-2009 02:47 AM
Craig Smith
Quote:
Originally Posted by chef2sail View Post
30 feet of chain later I am like WILEY T COYOTE with just the end chain in my hand. It has parted and we lost the anchor.
The chain parted - wasn't the shackle? Was the chain mickey-mouse beforehand, i.e. rusting?

Quote:
Originally Posted by chef2sail View Post
1- I have never used a swivel, but think I should this time for the wind and current shifts I anchor in. Should that be attached to the anchor or to the shackle on the anchor... and then to the chain. What kind of swivels have other used which works best.
Wind and current shifts are not usually a reason to use a swivel, unless you're doing lots of 360s (enough to kink the chain). Swivels are useful for some other limited reasons, but on a good set-up are usually not necessary. We've done 10s of thousands of miles and anchored all over the world, and never used a swivel. They can be useful to help the anchor right itself if you're not using all-chain, but a quality shackle is much better value for money and generally represents one less thing to worry about. See here:

Quote:
Originally Posted by chef2sail View Post
2- I was thinking of purchasing a small float and attaching 50 or so feet of lite 3 strand line to it and then to the anchor to use as a trip system should I have trouble getting the anchor up. Playing out only the amount of line when I drop the hook that the water depth the anchor is in plus maybe 8 ft to allow for swells/ wakes. What kind of similar systems do you use.
Sure, it has a number of advantages and in your story would mean that recovering the anchor would not require snorkelling for hours.

See here: www.rocna.com/kb/Buoyed_retrieval_line

Quote:
Originally Posted by chef2sail View Post
3- I am liking the 60 ft chain 250 feet line rode combo I had previously used. It given a lot to lay on the bottom, which not having all the weight of an all chain rode.
Fine, chain usage relates to the locale and has little impact on anchor performance or security. Whatever works for you.

Quote:
Originally Posted by chef2sail View Post
4-snubber. What if any does everyone use when anchoring (not mooring)
www.rocna.com/kb/Snubbers

(sorry for all the links but otherwise I'm just repeating myself)

Quote:
Originally Posted by chef2sail View Post
I don't want this thread to turn into a discussion about anchors as I am decided on the RONCA as long as she fits into my current bow rolled/ bail configuration
C&C 35 with a Rocna 15:
www.rocna.com/kb/C&C_35_Mk_1

I would say the 20 will fit similarly, but if you don't trust that or think the shank length might be an issue, e-mail Rocna and ask them for the full scale anchor profiles which you can use to check.
08-10-2009 10:58 PM
jackdale To break out an anchor, REVERSE out. That might seem counter-intuitive; but it works. Going forward invites gelcoat damage.

Jack
08-10-2009 10:45 PM
fullkeel7
Quote:
Originally Posted by chef2sail View Post


1- I have never used a swivel, but think I should this time for the wind and current shifts I anchor in. Should that be attached to the anchor or to the shackle on the anchor... and then to the chain. What kind of swivels have other used which works best.
Dave
I can't locate it again, but one of the expensive SS swivels sites showed their swivel attached directly to the anchor and recommended that in the verbage. The add mentioned that the swivel mainly aids in the anchor's correct orientation onto the roller during retrieval. Never used one??
08-10-2009 10:32 PM
St Anna CHef,
SOunds like you did everything properly and a poor link parted company. As you said, lucky it happened in a quiet place. I hope it was a good Merlot and not some cask wine - and I hope you finished your glass without spilling a drop !!

Your cruising area has always appealed to me. If possible, please email me some photos.
David
08-10-2009 10:32 PM
lancelot9898 I see that you already answered my question while I was typing. Maybe a test on the remaining chain would be in order? I would not use it again although it does not seem to be under any strain?? How old and what size and material? Try to recover the anchor and remaining chain would also help understand just went on.
08-10-2009 10:24 PM
lancelot9898 I would want to investigate as to why the anchor system failed in 10 knots of wind and understand that before making a decision on a new anchor system. And why the long scope??
08-10-2009 10:18 PM
chef2sail Our usual procedure for anchoring is me dropping the hook in a controlled free fall so the chain does not just pile on top of the anchor. We have a manual windlass so this is actually quite easy. Once my scope is 5X depth my wife put the engine in reverse and makes sure the anchor is set properly under load. I would then let out the appropriate scope. The reason we did 12X is that they were actually calling for SMW of 18-22 knots.

What was so amazing about this is that the chain parted at the 30 foot mark. It wasn't the case of a loose shackle or failed one as there was originally 60 feet of chain. We also appropriately had 3 wraps of seizing wire on the shackle.

Cam thanks for the advice on the snubber. I was figuring the "give" in the nylon rode will take up the shock. Even though we primarily anchor in the Chessie we also take some long trips every year. This year we went to Mystic and Block Island and next will be Newport, Cuttyhunk. Martha's Vineyard and Nantucket.

I only thankfully the chain didn't part when we were anchored in Branford between two rock groups called Big and Little Mermaid.

Dave
08-10-2009 09:56 PM
St Anna My situation appears to be different to yours, so this is just what I do.
I am guessing your shackle just parted company and the weight of the chain kept you quiet until breeze increased to 10kn. Things can happen no matter how well you prepare.

I use galvanised chain and anchor and tested galv shackle to join chain to anchor. Shackle is moused. I usually use a long snubber line for stretch and a big loop of chain between snubber and boat. I have No.2 anchor on its own chain ready to go no matter what.

In quiet conditions you usually need not use more than 4:1. (Did you really have 12:1 out in <10kn of breeze?) Do you 'set' the anchor or just drop it? I use a trip line if I am worried about it or cannot dive down. I would oversize the anchor and chain, but not too much.

If I am worried about dragging - I mark the position on the GPS where the anchor was dropped. If I have 60' of chain out, then I can move no more than 120' - [usually only the 60']. Any more and I am dragging. This hasn't happened yet with my combo, but peace of mind is worth a lot if worried and tired.

Cheers
DC
08-10-2009 09:55 PM
camaraderie Chef...assuming the Chessie is your cruising ground for the forseeable future, I second your chain/rope combo plan...though I would go shorter on the chain...perhaps 40-50 ft...so that you will have more nylon out even in shoal anchorages.
They nylon will serve as your snubber so you need no other unless you lay to your chain only...which will only complicate things when you have the nylon rode available simply by letting out more scope.
I would not bother at all with a trip line in the Chessie unless you are planning on anchoring in Baltimore Harbor. To break out a stuck anchor, simply drive the boat up on the rode till it is vertical then snub the rode off as you drive the boat forward if the seas are too calm to do that for you.
There is no need for an anchor swivel and it adds complication and an additional point of failure.
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