Chain size

[gianenrico]

Gentlemen,
apart from personal likes and dislike, is any of You aware of a site where is it possible to find, for navigation in waters around Europe, a table matching boat displacement and chain size?
Thanks in advance

 

[philip_stevens]

Have a look here chain size

 

[Talbot]

I would be careful of just following jimmy greens recomendations. Most people recognise that they are the absolute minimum requirement and are a bit light for anything other than a lunch hook on a not to windy day. Go at least one anchor/chain size bigger.

 

[philip_stevens]

Talbot,
I think JG is just about right on sizes, as my previous boat, a Konsort had 6mm anchor chain on when I bought her, and when she was being coded for charter, the surveyor stated that the correct size should be 8mm.

My present boat, a heavier Duo, came with 8mm, but only 25mtrs. I am now about to replace that with 40mtrs of 8mm - just to be on the safe side when anchoring in the Channel Islands.

JG recommends 8mm up to 10mtr boat - ours is 9mtrs. I think 10mm would be a bit too heavy for her.

 

[tazzle]

MCA recommend chain / chain-rope length to be 4 x boat length or 30m whichever is greater. Main and kedge anchor mass for high holding power anchors recommended as:

7m length - 9Kg, 4Kg
8m - 10Kg, 5Kg
9m - 11Kg, 5Kg
10m - 13Kg, 6Kg
11m - 15Kg, 7Kg
12m - 18Kg, 9Kg
13m - 21Kg, 10Kg

8mm chain on everything up to 20Kg for the main, 6mm chain on everything up to 11Kg for the kedge (or 12/14mm rope and 10/12mm rope respectiveley for mixed)

 

[TigaWave]

Heres the table in the MCA blue code as raedwald has suggested.
http://www.bluemoment.com/codeofpractice/annex5.html

 

[trouville]

Ive always used 8mm chain, on my 12 ton Hillyard i had 60 meters on my bower and 40 on the kedge.
Even in rough ancorages i never snaged. With so much weight by the time the boats pushed back it would have to be a very rough place to more than drag the anchor.

6mm just too weak and to light for any boat 10mm is just to heavy! I always brought my chain in by hand and just used the winch for the bit from seabed to deck!

Remember mostly youll be anchord in 6m but in Portoferrio its 15/20m, for example then you would have 20/30m of chain pulling the bow down!! 8mm the best!

You also have to drive about with the chain in the chain locker, a lot of weight.

The best anchor made is the Brittany.Holds really well and easy to stowe.!!!Im sure everyone would agree?

 

[hylass]

[ QUOTE ]

The best anchor made is the Brittany.Holds really well and easy to stowe.!!!Im sure everyone would agree?

[/ QUOTE ]

Sorry if I disagree.. The best one is, without any doubt, The Gorgone anchor.. this is the anchor which has the World's longest experience.. still used in some part of Amazonia and in Patagonia.. and all users are very happy with it..

 

[hylass]

[ QUOTE ]

The best one is, without any doubt, The Gorgone anchor..

[/ QUOTE ]

And if you're not fully satisfied?? Why don't you try the "Biblos" one??

 

[trouville]

It would go very nicely on my new Folkboat! Might hold well in the weed and mud!

The second one do you have to pray it stays!!

Really great super pics of them Thanks!!!

 

[Ships_Cat]

The Gorgone anchor is known to perform better than any other as long as one uses a nice springy nylon rode with very little chain /forums/images/graemlins/smile.gif.

John

 

[GMac]

[ QUOTE ]
MCA recommend chain / chain-rope length to be 4 x boat length or 30m whichever is greater. Main and kedge anchor mass for high holding power anchors recommended as:

7m length - 9Kg, 4Kg
8m - 10Kg, 5Kg
9m - 11Kg, 5Kg
10m - 13Kg, 6Kg
11m - 15Kg, 7Kg
12m - 18Kg, 9Kg
13m - 21Kg, 10Kg

8mm chain on everything up to 20Kg for the main, 6mm chain on everything up to 11Kg for the kedge (or 12/14mm rope and 10/12mm rope respectiveley for mixed)

[/ QUOTE ]

Typical 'survey' table which takes no account of what XXmetre boat is on the end. Regard as a very very ruff guide only.

Is that 10mt (say) boat a lightweight flyer i.e 3000kg or an old high wooded clunker weighing 12000kg with a windage issue. Using the same gear on each is plain bloody stupid.

One rule fits all is a complete pile of cr*p.

2 points of interest;
We down under use lots of 7 and 9mm chains for anchoring as well. It seems very strange Northern Hemisphere boats don't seem to use or even know of it's existance. Supply is not a problem, we get all of ours from Italy.

Anchor rodes of 4 times boat length or 30mts??? Does anyone ever anchor out side of the marina itself

Note: Not having a go at the poster but definatly having one at MCA. We enjoy MCA stuff, it gives us a great laugh.

MCA - the people who don't allow metal in Monkeys fists so it does not hurt anyone dumb enough not to be watching. They do allow golf balls though because getting hit in the head by one of those is perfectly fine, appearently . I wonder if we can test this theory on one of their inspectors

The Jimmy Green table is a tad heavy on the small end and a tad light on the bigger end. Some mis-matches in the rope to chain areas but not too bad a 'guide'.

philip_stevens and trouville - 9mm maybe. 1.85kg/mt nearly 0.5 kg/mt lighter than 10mm and takes up a lot less space. Break load only 500kg (4500kg) less if you use a EN818-3 standard chain. We get tonnes of it made in Italy, it's good stuff as well. There is an English crowd who can supply but I'll have to hunt out a name.

Just remember the length of the boat is not as big a issue as displacment and windage when specing anchoring gear. When your 'mass' gets moving in angry weather the rode has not idea how long your boats is only how heavy.