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Storm Anchor

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Initially Posted - 07/11/2010 : 17:37:32

Man... I love e-bay!
So I was making plans for this years Hurricane season. Trolling on eBay looking for anchors and I fine a 43 pound Danforth, brand new with stickers still on it for $88 and only $8 bucks to ship. What a deal! Also scored on 150' 5/8 nylon for 51 cent a foot too.

Picked up 30' of 5/16 galvanized chain at a local hardware supply store.

Now looking for a good shackle.

1997 250 TR WK (sold)
1984 O'Day 28 (sold)
1979 SISU 22
Bath, NC.

Edited by - on

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 07/15/2010 : 20:45:15

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tom Potter
 ...Picked up 30' of 5/16 galvanized chain at a local hardware supply store...<hr height="1" noshade id="quote"></blockquote id="quote">Is it "Hot-dipped"? If it's electroplate galvanizing (common in non-marine stores), it won't last long in salt water.

Edited by - on

Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 07/16/2010 : 17:40:58

Dave,
It is hot dipped but I have discovered it has only a 1900 WLL, I'm a little concerned about that. I'll be anchoring in the creek in front of the house, its well protected and has a solid tree lines on three sides to help cut back on some of the wind. Just not sure if the 1900 WLL will do?

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Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 07/16/2010 : 19:34:17

My first reaction was 5/16ths could handle anything the wind could dish out with a C-25. Then I Googled it and found [url="http://trawlercrawler.net/viewtopic.php?f=8&t=145"]this.[/url] Considering the frontal area of a 25' sailboat (adding a little for the mast), I don't think that chain is a problem.

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Stu Jackson C34
Admiral

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844 Posts

Response Posted - 07/19/2010 : 09:49:26

Use the tables on this thread: http://c34.org/bbs/index.php/topic,4990.0.html

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Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 07/19/2010 : 13:34:25

Sorry--I forgot you have a 28... Is this plan for a hurricane? IF so, if it blows 100, how much less do you think would be hitting your boat? Can you swing to keep it on the bow with plenty of scope? Will this be your only ground tackle for the storm? Are the trees on the sides of this "creek" such that, for a hurricane, you could tie off to them on two sides instead of anchoring? Just curious...

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 07/19/2010 : 17:41:26

Yes the set up I'm working on is my hurricane anchor. There are plenty of trees to cut the wind (how much who knows). The locals tell me the area in front of my house is the favorite hurricane hole. This is good and bad for me. Good that its in front of my house, bad because I expect a lot of boats will be using it.

Based on the calculations and charts you guys posted it appears that I have a rig set up for a WLL of about 110 mph winds. I should have a fair amount of safety (BL) built in. This is based on the sq foot of the area of the boat that will be headed into the wind and the WLL of the ground tackle.

All said, looks like the 5/15 chain will be my weakest link with a WLL of 1900 pounds. The 3/8 shackles have a 2000 WLL. I'm not to worried about 5/8 nylon and the "oversize" 43 pound danforth.

My concern now is to use one anchor or two anchors 180 degrees apart. Today I spoke with a old salt that has circumnavigated the globe many times, twice single handed and tells me he has anchored several times in hurricanes. He tells me he would only use one anchor, as the 180 degrees set up tangles and can hang up on the rudder,prop etc. which will cause the boat to ride sideways and increase the strain on everything. He also tells me he aways uses a swivel on the anchor shank. Most of what I read says not to use a swivel. Yet this old guy with plenty of hurricane experience says differently.

Edited by - on

DaveR
Master Marine Consultant

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USA
2015 Posts

Response Posted - 07/20/2010 : 07:24:43

Tom I've got the same sort of hurricane option at my brother's house that's on a canal and am very thankful! I tie Bamboo off to some palm trees. Of course that wouldn't matter if the 300 year old Oak (actually there's two) came down!

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Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 07/20/2010 : 10:01:29

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tom Potter
 ...My concern now is to use one anchor or two anchors 180 degrees apart. Today I spoke with a old salt... He tells me he would only use one anchor, as the 180 degrees set up tangles and can hang up on the rudder,prop etc. which will cause the boat to ride sideways and increase the strain on everything. He also tells me he aways uses a swivel on the anchor shank. Most of what I read says not to use a swivel. Yet this old guy with plenty of hurricane experience says differently.<hr height="1" noshade id="quote"></blockquote id="quote">An all-chain rode on a permanent mooring needs a swivel because the rotation of the boat around the mooring can twist the chain into a clump. But I don't see how a nylon (or partial nylon) anchor rode needs one. It will most likely be the weak link in your system, and the boat is only going to rotate a few times around the anchor from the time it's set until the storm is over.

One anchor will mean a lot of swing... You need to know what the other "many" boats sharing your hole are doing. If they swing, you want to swing--if they don't, you don't. The 180 setup lets you rotate without swinging much, and shouldn't wrap on your keel if you have enough slack that when swinging against one rode, the other rode hangs loose to the bottom. But I guess a big storm surge could change that by lifting the boat to where neither rode is slack enough. Too bad you can't remove your rudder and engine like most folks here can!

Another consideration is the path of the storm, which determines the wind directions you'll face (based on its counterclockwise rotation). A day or so out, you should be able to predict how you and others will swing, or if boats are anchoring fore-and-aft, which direction you want to be facing. Then you might be able to use a tree or two as some of your "anchors".

I'd probably spend the day before the storm out there watching what everyone's doing, negotiating, and directing traffic as necessary. (Of course some late-comer will screw it up.)

Edited by - on

Champipple
Master Marine Consultant

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USA
6855 Posts

Response Posted - 07/20/2010 : 11:20:23

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tom Potter
 Man... I love e-bay!
So I was making plans for this years Hurricane season. Trolling on eBay looking for anchors and I fine a 43 pound Danforth, brand new with stickers still on it for $88
<hr height="1" noshade id="quote"></blockquote id="quote">

I was searching ebay and found a place that makes the stickers for brand new Danforths and anchor cleaning supplies for $2.00 a set....

Great deal I hope you never need it(for a hurricane), and a really great deal on the shipping too. We just purchased a Garhauer over the Cabin-top traveler and associated mainsheet tackle. Our shipping was more than your anchor.

Edited by - Champipple on 07/20/2010 11:21:14

Stinkpotter
Master Marine Consultant

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Djibouti
9081 Posts

Response Posted - 07/20/2010 : 15:29:41

Duane... You mean I can buy a brand new Danforth sticker for my anchor on e-Bay? How cool is that?? I can replace the stickers on my scratched up Delta!

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