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  #1  
Old 04-16-2014
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Main anchor question.

I have two anchors on my boat. Both seem to weigh @20LBs and are the same style.
The one I use as my "main" has 190' of 3/8" polly line and 53' 10MM light chain.

My stern anchor has 120' of 7MM polly line followed by 30' of heavy 3/8" chain.

My question is should I switch the heavy line to the heavy chain or do you think the extra 23' of chain makes up for its light size?



Thanks for the time and advice.
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Old 04-16-2014
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Re: Main anchor question.

Not sure about your description of the change since 3/8" is basically the same as 10 mm. The chain is more than enough for a boat and anchor of that size. I have 3/8" chain on a 40,000 pound boat. The poly line is not at all strong, that would be the first thing to replace I think. Is the anchor on the right a genuine Danforth (it should be stamped on the shaft)? If so, it will be a much better anchor than the other one. I would use the right-hand anchor, either chain and a new piece of nylon, 3-strand. How deep is the water where you anchor? that could help with your choice. Allow 7 to 1 scope, based on the depth of the water, the height of your bow, and any tidal increase that might happen. So if the water is 20' and the tide is 5' - you are working with 20 + 5 = 5 = 30 feet times 7. You would want roughly 210 length of anchor rode.
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Old 04-16-2014
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Re: Main anchor question.

Dont know why I put 10mm the small chain is 1/4"
I only sail on a lake so no tide. I normaly anchor in 15-20 feet of water with soft sand and a few large rocks.
I would like to anchor out overnight and want to make shure I get the best set incase the winds come up at nght.

Thanks again.
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Last edited by Cope44; 04-16-2014 at 02:57 PM.
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Old 04-16-2014
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Re: Main anchor question.

To be honest, I would use neither set-up.

Danforths will trip in a wind shift. The one on the left is especially bad for that.

Poly chafes quite badly. Anchor rode should be nylon to give some stretch and shock absorbency.

I have used Danforths as secondary anchors in conditions which are not subject to wund shifts, but never as a primary.

Poly chafes quite badly. It also floats - not good.
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Last edited by jackdale; 04-16-2014 at 04:19 PM.
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Old 04-16-2014
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Re: Main anchor question.

The heavy chain is a poor match to the anchors, but as long as you have it you might as well use it. If you want a more secure hold, heavier chain is better.

You don't have an anchor rode. That yellow poly rope will work great to mark out a swimming area, but it's not an anchor rode. Get some nylon rode.

GTJ
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Re: Main anchor question.

so the heavier shorter chain should hold better than the much longer much lighter chain?

What makes the anchor on the left worse than the one on the right? The left one seems just a tad heavier.

Thanks again for the time and advice.
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Re: Main anchor question.

Quote:
Originally Posted by Cope44 View Post
so the heavier shorter chain should hold better than the much longer much lighter chain?

What makes the anchor on the left worse than the one on the right? The left one seems just a tad heavier.

Thanks again for the time and advice.
Your 30' of heavy chain should be about 53 lbs. Your 53' of light chain is probably 38 lbs. URL reference is here: New Page 1

How heavy is your boat?

GTJ
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Old 04-16-2014
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Re: Main anchor question.

With the anchor on the left [edit, oops], if the wind switches in the middle of the night the boat will 'sail' over the anchor making the shackle slide up the slot to the other end. The boat pulling will then pull the anchor out of the mud. It may or may not reset itself. With the other anchor, the pull stays at the end of the shank so when the wind shifts you will have a chance that the anchor stays in the mud and just pivots to the new direction.

There are lots of anchor designs out there, some of which are much better than either of these but they are not cheap and you have these two. I would go with the anchor on the right, the 3/8" chain which is sort of overkill for the size of anchor and boat, but that is not a bad thing. Invest in 200' feet of 1/2" (or even 7/16") nylon rode with a loop spliced in the end where it connects to the chain. You want a 'thimble' (doesn't look anything like a sewing thimble) inside the loop for chafe protection. Make sure the anchor shackles are sound and after you tighten the shackle pins lock them either with wire ties or stainless wire (better) methods. With either you go through the hole in the shackle pin and around some part of the bow of the shackle.
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Last edited by killarney_sailor; 04-16-2014 at 10:24 PM.
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Re: Main anchor question.

Quote:
Originally Posted by Cope44 View Post
What makes the anchor on the left worse than the one on the right? The left one seems just a tad heavier.

In a wind shift, the slot in the shank will allow the shackle and chain to slide down the shank and dislodge the anchor from the bottom.
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Old 04-16-2014
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Re: Main anchor question.

Quote:
Originally Posted by Cope44 View Post
Dont know why I put 10mm the small chain is 1/4"
I only sail on a lake so no tide. I normaly anchor in 15-20 feet of water with soft sand and a few large rocks.
I would like to anchor out overnight and want to make shure I get the best set incase the winds come up at nght.

Thanks again.
put down both in a Bahamas setup
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